Every year for the past century, in the green hills of rural Denmark, thousands of Americans and Danes come together to celebrate the Fourth of July.

The gathering is billed as the largest Fourth of July celebration outside the United States, and partygoers decked out in the Stars and Stripes sing American songs, eat hot dogs and, because this is Denmark after all, down Danish beer and aquavit.

This year it’s going to be a little different.

Organizers are expecting the smallest crowd ever. Some locals say they are sitting it out. And the American government has been uninvited, something that has never happened before and in the past would have been unthinkable.

Nixon. Reagan. Walter Cronkite. Walt Disney. Even Dionne Warwick. Some real heavyweights have flocked in on the Fourth to this blip of a town, Rebild, surrounded by purple heather fields and pig farms. Just about every year, the American ambassador to Denmark makes an appearance.

But this year, President Trump’s threats to take over Greenland, a Danish territory, have soured the mood. His obsession with Greenland has hijacked what used to be a very tight Danish-American relationship. Many Danes now question why they should celebrate the most patriotic day in the United States, on Danish soil, with public funds no less.

And so local politicians, no doubt smelling a juicy issue, stepped in.

Lasse Olsen, a municipal council member who has agitated against the event for years, called Mr. Trump “an imperialistic mad man.”

He said that, given the way Mr. Trump had behaved toward Denmark, the presence of any officials from his administration would “disturb and distort” the festival. He led the charge this spring that gave the event’s organizers an ultimatum: Cut American officials from the program or lose logistical support and public funds (typically around $50,000).

The festival organizers agreed to remove U.S. officials from the program and said that embassy officials were sad about it but accepted it. The organizers also said that any Americans coming to the event this weekend in a private capacity were welcome.

The change stings. Organizers plan all year for a gala, a business round table and live music, culminating in an outdoor bash usually with some famous speakers. But this year, all anyone is talking about is Mr. Trump.

“It’s embarrassing,” said Bruce Bro, a retired American businessman with Danish ancestry who is a board member of the Rebild National Park Society, the organization that plans the party. He said that he supported the decision to keep American officials from participating.

“You don’t want people throwing a drink on the ambassador,” he said.

The U.S. Embassy in Copenhagen declined to comment.

The annual pilgrimage to Rebild started in 1912. It was the vision of Max Henius, a Danish American biochemist who helped refine beer brewing. He organized the purchase of land in the hills as a place to celebrate the bonds between Denmark and the United States.

In the early days, Danes who emigrated to America (many to the Midwest, where the landscape reminded them of home) flocked back to Rebild on the Fourth to reconnect with kin. After World War II, when the United States was seen as a hero and ties to the old country were still strong, Mr. Bro said that 50,000 people would show up.

But those ties have faded. And the party in Rebild has taken a hit. Recent crowds rarely surpass the low thousands. This year, organizers say they’ll be lucky to get a thousand.

The program still includes singing the Danish and American anthems, admiring classic American cars, eating hot dogs and open-faced shrimp sandwiches and spotting people dressed as American historical figures.

Last year, Denmark’s foreign minister was the keynote speaker; this time, another minister, lesser known, is planning to come, the Foreign Ministry said.

Lasse Frimand Jensen, mayor of Aalborg, which is one of the municipalities involved in the party, said that his council had decided to take a stand against American officials only after consulting with colleagues in the central government.

The mayor wouldn’t say who, but he’s well connected in the same political party as Mette Frederiksen, the prime minister, who has irritated Mr. Trump by her steadfastness over Greenland. She’s from this same area of Denmark, too.

Over the past few days, organizers have gone through their pre-party rituals: smoothing out American state flags to decorate the party ground, setting up tables and chairs and readying a fleet of golf carts to ferry older people down the gravelly path to the spot in the rugged green valley where the festivities take place.

Organizers say their biggest struggle is to attract younger people.

Mr. Bro said that he heard a lot of people, young and old, saying they didn’t want to come this year because of all the Greenland tensions. As for his own views, he said that he was “horrified” when Mr. Trump threatened to snatch the island from Denmark and that his relatives felt the same way.

“It’s very sad,” he said. “We want to keep this tradition alive. And we blame Trump.”

Russia’s president has said he understands why the Trump administration is “distracted” by Iran. Ukraine’s president has lamented that his country is not the top U.S. priority, telling reporters, “unfortunately, we are in this queue of these wars.”

In the meantime, Russia and Ukraine have escalated their attacks on each other’s territory to what experts describe as one of the most dangerous moments since Russia’s invasion began more than four years ago.

At the center of the disconnect between the increasing violence in Eastern Europe and the Trump administration’s seeming lack of focus on it are the president’s two main negotiators for both Iran and Ukraine: the special envoy Steve Witkoff and Jared Kushner, President Trump’s son-in-law. They traveled to Qatar this week for another round of Iran talks, even as Ukraine was launching more drones toward Moscow and as Russia was readying its latest barrage targeting Kyiv, where at least 21 people were reported killed Thursday in overnight attacks.

The last time Russian and Ukrainian officials are known to have met face to face was in Switzerland in February, with Mr. Witkoff and Mr. Kushner sitting between them. In the months since, the Iran war consumed the Trump officials’ attention, even as the fighting escalated between Russia and Ukraine — a conflict that Mr. Trump had promised to solve within 24 hours.

“We were focused on Iran,” Mr. Trump said last month, suggesting that the administration could renew its efforts to end the Ukraine war once Iran was “in the rearview mirror.”

The limited diplomatic bandwidth at Mr. Trump’s disposal has highlighted his extraordinarily slimmed-down approach to high-stakes diplomacy. The post of U.S. ambassador to Moscow has been vacant for more than a year, and the acting ambassador to Kyiv resigned in April. Secretary of State Marco Rubio and other top diplomats have played a limited role on Ukraine, leaving Mr. Trump’s two envoys as the pivotal players.

To both Moscow and Kyiv, locked in a grinding war that has killed or wounded more than two million troops, Mr. Witkoff and Mr. Kushner are valuable contacts with direct lines to the American president. But they also represent a bottleneck, without the diplomatic teams that would normally lay the groundwork for high-level talks.

President Volodymyr Zelensky of Ukraine gave voice to frustration with the pair in comments to CBS News on Thursday, saying that he was still waiting for them to visit Ukraine.

“I understand that there are challenges in the Middle East,” he said, adding, “but we need more, more than words.”

Mr. Witkoff and Mr. Kushner, who both helped broker a cease-fire in the war in Gaza last year, are real estate developers who describe themselves as deal makers who eschew the staid traditions of diplomacy. A senior U.S. official said that approach means they juggle multiple negotiations at a time, just as they did in their business careers and as Mr. Kushner did during Mr. Trump’s first term.

The official, speaking on condition of anonymity because of the sensitivity of the talks, said the two men had remained in touch with Ukrainian and Russian officials almost daily, and had held in-person meetings with them that have not been reported. The official said that Mr. Kushner and Mr. Witkoff were prepared to travel to Russia and Ukraine if there was something new to discuss, but that they would not travel “for a photo op.”

In Moscow, officials are also eager for Mr. Witkoff and Mr. Kushner to re-engage, according to two people close to the Kremlin and two former diplomats who visited Moscow last week.

The Russians are “desperately waiting for the return of Witkoff and Kushner,” said one of the former diplomats, Thomas Greminger, the head of a Swiss think tank who traveled to Moscow for a foreign policy conference. “There’s a lot of frustration about the two. At the same time, nobody has an alternative to U.S. facilitation.”

President Vladimir V. Putin of Russia values his relationship with Mr. Witkoff in particular, the two people close to the Kremlin said. Mr. Putin sees the close friend of Mr. Trump as a critical channel for accomplishing Kremlin goals that only the United States can deliver, including an arrangement keeping Ukraine out of NATO.

But Russian officials have been frustrated by the uneven nature of those visits and lack of follow-up, and have voiced a desire for a more structured diplomatic process, according to people familiar with the negotiations.

“If you’re going to move this process to resolution, it requires an intense diplomatic effort,” said Thomas Graham, a longtime American diplomat who managed a strategic dialogue with the Kremlin during the George W. Bush administration and was also at the Moscow conference. “The U.S. is the only country in a position to lead it, if they were so inclined.”

Mr. Witkoff has met with Mr. Putin seven times since Mr. Trump returned to office, most recently this past January and December, when he was joined by Mr. Kushner. He has yet to visit Ukraine. Mr. Putin said on Sunday that he expected the pair back in Moscow after the end “of the ‘hot phase’ on the Iranian track.” The diplomatic vacuum left by the United States has also been evident in Europe, where officials from across the continent have yet to resolve a debate over who among them might be the right person or group of people to talk to the Kremlin.

In January and February, Mr. Witkoff and Mr. Kushner convened a series of meetings that were among the first direct, in-person talks between Russia and Ukraine since the war’s first weeks in 2022. Those meetings ended after Mr. Trump went to war with Iran on Feb. 28, a conflict that thrust Mr. Witkoff and Mr. Kushner into the center of increasingly urgent efforts to negotiate an end to an unpopular war.

But while U.S. attention was consumed by Iran, the Ukraine war only intensified. Ukraine honed its long-range strike capabilities, assaulting Moscow, disrupting Russian fuel supplies and pressing a campaign to cut off the Russian-annexed peninsula of Crimea in an effort to change the tide of the war. Mr. Putin rejected a taunting meeting request from Mr. Zelensky and ramped up his strikes on Ukraine.

To their critics, Mr. Witkoff and Mr. Kushner have sought a peace agreement that would reward Russia for its aggression by acceding to some of Mr. Putin’s demands on Ukraine and enabling business deals with Russia. That has led some to argue that their distraction in recent months has benefited Ukraine by reducing the pressure on Mr. Zelensky to accept Russia’s terms.

“The drama of more Witkoff-Kushner trips simply won’t shift the trajectory of the war,” said Andrew S. Weiss, who oversees research on Russia and Eurasia at the Carnegie Endowment for International Peace.

Mr. Weiss, a former State Department official, warned that the war had entered an “escalatory spiral” of increasingly aggressive Ukrainian strikes deep into Russian territory and Russia’s drone and missile barrages. Ukraine was vulnerable, he said, because its air defense capabilities have been outstripped by Russia’s ability to produce more missiles. The United States, he argued, needed to work closely with Ukraine “to have some influence over the choices they make about targeting and tactics.”

But Mr. Trump has played down the stakes for the United States, while insisting he wants to end the war.

“It has no impact on us, other than we sell weapons,” Mr. Trump said on the sidelines of the Group of 7 summit in France last month. “We’re thousands of miles away.”

Analysts say Europe’s bloodiest conflict since World War II does affect the United States, and that it could still escalate into an even bigger conflagration. Mr. Zelensky has recently threatened neighboring Belarus, a close Russian ally, while Mr. Putin could choose to test Mr. Trump’s resolve to defend NATO allies in Europe.

“This conflict is not one that waits for you to have time for it,” said Samuel Charap, a political scientist at the RAND Corporation think tank. “It’s constantly evolving. The risks of escalation are always there.”

Jeanna Smialek contributed reporting.

Eight days after two earthquakes devastated Venezuela, rescuers on Thursday pulled a 44-year-old man alive from the rubble of a collapsed basement, providing a rare moment of hope after a week of desperation.

His name was Hernán Gil, and his rescue came as both the death toll and criticism of the government’s response to the disaster mounted in a country whose institutions have been decimated by years of economic crisis. The toll reached 2,295 on Wednesday, according to the Venezuelan government, and is expected to rise.

Over several days, the attempt to rescue Mr. Gil from the ruins of La Guaira state, perhaps the hardest-hit area of the country, had captivated Venezuelans. As rescuers kept him alive by giving him water and other fluids through a tube, international journalists looked on, among them a photographer working for The New York Times. The President of El Salvador, Nayib Bukele, chronicled the effort on X.

The operation was led by a Chilean search-and-rescue team, which said that Mr. Gil had been rescued after more than 70 hours of work.

The rescuers established contact with him on Monday morning using radar, sonar and acoustic detection equipment. They confirmed his location visually 12 hours later using a search camera, determining that he was trapped beneath the second basement level of the building.

They were also able to speak to him.

“Move your hand again, just like you were doing,” one rescuer directed Mr. Gil as the camera showed his fingers reaching out of the rubble. “Very good, Hernán. Perfect.”

For days they tunneled toward him, repeatedly stopping to stabilize the structure as debris fell.

Mr. Gil’s wife, Gusbimar González, told a Spanish news media outlet, EFE, that it was a “miracle.” Earlier, she had been warned that there was no hope of finding him alive, she said.

Mr. Gil worked as a security guard at the building, a little more than two miles from the country’s main international airport. He was trapped in a booth when the basement, which is topped by shops and residential apartments, collapsed around him, said Trey Espy, who headed a search-and-rescue crew from the Los Angeles County Fire Department that traveled to Venezuela following the disaster.

After the Chilean rescuers discovered him on Monday, they called in the Los Angeles team for help, along with rescuers from Virginia and Florida. Rescuers from Mexico, El Salvador and Portugal also offered aid.

Mr. Espy said that the huge amount of wreckage complicated the rescue.

“One wrong move, one thing moved the wrong way, and all that debris would have fallen down on him and killed him,” Mr. Espy said. “And if there was another aftershock, the rest of the building could have come down — and all of our rescuers were there.”

He said, “We got to the point where it was moving just one rock at a time to make sure we didn’t pull out the wrong rock and bring the whole thing down on top of him.”

By Wednesday night, Mr. Espy said, after days of chipping away at the mountain of debris with shovels, pack axes and their bare hands, the team members knew they were close. Chilean rescuers monitored Mr. Gil, passing him safety goggles to protect him from falling particles as he looked at the camera with a bloodshot eye.

They finally got him out around 9 a.m.

“The reaction of the team was joyous,” Mr. Espy said. “He was exhausted. The doctors just immediately went in and started treating him.”

Before he was pulled out, Mr. Gil did not appear convinced that he could be saved.

“When we found him, he asked us not to tell his wife that he was alive, just in case he wouldn’t make it,” a rescuer with the Costa Rican Red Cross, Minyar Collado, told The Associated Press.

Mr. Gil is now in a hospital in stable condition, Mr. Espy said.

A co-worker at the building, José Rivero, said he believed Mr. Gil survived because of nearby water tanks that protected him from the pancaked building, giving him space to move.

He was praying for his colleague to make it out alive.

“He is a good co-worker,” Mr. Rivero said. “He likes to help out with everything. He has a family, he has children. They are waiting for him.”

Mr. Gil’s brother, Gunther Gil, who lives in Chile, wiped tears from his eyes on a Chilean television program as he described learning that his brother had survived.

“It was tremendous anguish,” he said. “But it had a happy ending.”

Sheyla Urdaneta and Adriana Loureiro Fernandez contributed reporting.

The reported illnesses this spring initially looked like the spread of a typical stomach bug on a luxury ocean liner, but the situation quickly escalated to a fatal outbreak of hantavirus, a rare rodent-borne pathogen, leading to weekslong quarantines for the ship’s passengers and a global health alert.

But the outbreak is now over, the World Health Organization announced on Thursday. Overall, there were 12 confirmed cases and one probable case aboard the cruise ship, including three deaths.

The declaration was made after the final contact of a passenger completed a quarantine period and tested negative for the virus, said the health agency, which is part of the United Nations.

The announcement ended a three-month saga that had scientists scrambling to find the origins of a rare vector for hantavirus; crew members and passengers held captive on a luxury ship; and global health officials enforcing contact tracing and quarantines protocols.

The luxury cruise liner, MV Hondius, began its trip carrying 175 passengers and crew members from nearly two dozen countries as it left Ushuaia, an Argentine city, on April 1. The first passenger sickened by the virus died less than two weeks later.

The last reported case was on May 25, Tedros Adhanom Ghebreyesus, the director general of the W.H.O., said in making the announcement.

The passengers caught in the outbreak were to enjoy a leisurely journey aboard the state-of-the-art polar expedition ship from Argentina to remote islands in the southern Atlantic Ocean, including stops in mainland Antarctica, the Falkland Islands and Cape Verde.

Several passengers who boarded the ship were passionate bird watchers interested in the landfill in Ushuaia because it is a prime location to spot the white-throated caracara, a raptor bird. For a brief period, there was speculation that the landfill was the likeliest source of the contagion.

After the outbreak began, the ship was headed to Cape Verde, where government officials did not allow it to dock, saying that it was too small a country to handle the outbreak. The ship was refused entry in multiple countries, and the passengers and crew became isolated captives in the middle of the Atlantic Ocean.

Patient zero was a Dutch man, 69 years of age, who first showed vague, flulike symptoms on April 6, five days after the cruise began. He died on board on April 11.

His wife, also 69, became ill after leaving the ship with his body on April 24 on the island of St. Helena in the South Atlantic, where the ship was finally allowed to dock. She reported “gastrointestinal symptoms,” the W.H.O. said. She died on April 26 in Johannesburg, where she was going to take a flight home to the Netherlands.

About 30 people from at least 12 countries left the ship in St. Helena, a British territory. Two days after the second death linked to the virus, on April 28, a German woman had “fever and general malaise,” and then had symptoms of pneumonia, the W.H.O. said. She died aboard the ship on May 2.

The next day, after laboratory testing, the W.H.O. confirmed that the hantavirus was on the ship, attributing one of the infections to the virus.

While the ship was moored off the coast of Cape Verde, an archipelago in the Atlantic Ocean off West Africa, government and health officials around the world raced to find a way to evacuate the sick people onboard. By then, the hantavirus outbreak had been tied to seven people on the ship, according to the W.H.O.

The government of Spain allowed the ocean liner to dock on May 9 at Tenerife, one of the Canary Islands. It was nearly six weeks after the ship had left Argentina, and, during a two-day interval, all the remaining passengers were tested and disembarked.

By May 11, many of the passengers and some crew members were either on their way to their home countries, or had already arrived. Many of them, including 18 Americans, were quarantined when they arrived home.

On May 18, the Hondius arrived at the Port of Rotterdam, in the Netherlands, with only 27 passengers and crew members placed in a special quarantine area. After the ship was inspected and samples were collected, it was cleaned and disinfected.

Dr. Tedros said that over 650 contacts of people on the ship were identified, and that health officials in about three dozen countries and territories reached out to those contacts.

The W.H.O. said it believed the outbreak originated on land and was not an infestation from the multimillion-dollar ship. The agency identified the strain as the Andes subtype, which can be transmitted between people in close contact.

The Andes subtype caused the deaths of the two first patients who traveled on the ship, the agency said. It is endemic in three provinces across Argentina’s Patagonia, with several cases reported there every year, according to the health authorities.

There are no targeted treatments for hantaviruses, which are typically carried by rodents, and no widely available vaccines.

But Dr. Tedros expressed optimism that one could arrive.

“We are also coordinating a study involving 21 countries to understand how the disease develops,” he said, “which will support the development of diagnostics, therapeutics and vaccines for future outbreaks.”

A Texas man whose Tesla sedan was in an automated driver-assistance system mode when it crashed into a house last month in Katy, Texas, and killed a woman inside has been charged with manslaughter, court records show.

Michael Butler, 44, was operating his Tesla Model 3 using the autopilot function on June 19 when the vehicle left the road traveling at a “high rate of speed,” striking and entering the home of Martha Avila, 76, who was inside, the Harris County Sheriff’s Office said.

Ms. Avila was taken by a medical helicopter to a hospital, where she was pronounced dead, the sheriff’s office said.

Mr. Butler was charged on Wednesday with one count of manslaughter and is being held in the Harris County jail on $150,000.00 bond, court records show.

It was not clear if Mr. Butler has a lawyer.

The National Highway Traffic Safety Administration, the main federal auto safety agency, opened an investigation into the crash last month.

A front-door video camera that captured the crash showed the Tesla plowing into the house through its driveway. Ms. Avila was standing in the front room of her house at the time of the crash, officials said.

Mr. Butler showed no signs of intoxication and was cooperative during the investigation, officials said.

A Tesla executive, Ashok Elluswamy, who is in charge of the company’s artificial intelligence software, said on X late last month that the driver “manually overrode self-driving by pressing the accelerator.” He added that the car had accelerated to 73 miles an hour.

The autopilot function, Tesla’s driver-assistance technology, is a popular feature among drivers, but over the years it has raised concerns and been connected to various accidents. Tesla’s owners’ manuals tell drivers that they should keep their hands on the wheel and take over if anything goes wrong.

In 2023, Tesla recalled more than two million vehicles after federal regulators said the automaker had not done enough to ensure that drivers remained attentive when using the software that can steer, accelerate and brake cars automatically.

In 2024, Tesla settled a lawsuit that blamed the automaker’s driver-assistance software for the death of a California man in 2018.

Trump accounts, the investment accounts for children created in last year’s tax bill, officially open for contributions Saturday. So far, more than six million American children have been signed up, according to a Treasury Department spokeswoman — less than 10 percent of those under 18 who are eligible.

Babies born during a four-year period starting Jan. 1, 2025 — effectively covering the second Trump term — will receive a $1,000 deposit from the federal government in their account. So far, only 1.4 million children in that age range have been signed up, or about one-quarter of the children born so far who qualify.

The Trump administration has heralded the number of accounts opened. Researchers who study child savings accounts said they were pleased that millions of families opened accounts, but pointed to several barriers to recruiting more families. Many don’t know about the accounts. Some have been turned off by the name and its affiliation with President Trump.

And importantly, researchers say, many more children would have accounts if they were automatically enrolled, rather than requiring parents to sign up on a tax form.

The concern — shared by people across the political spectrum — is that the accounts will disproportionately be used by families who are already investing in the stock market (including on behalf of their children, like in 529 college savings plans), rather than granting access to the markets to children who otherwise wouldn’t have it.

Still, despite the relatively low uptake, families across the economic spectrum have opened Trump accounts. H&R Block said it helped open more than two million accounts for its tax preparation clients this year, accounting for about a third of all accounts opened. Thirty percent of clients with eligible children opened accounts, and the uptake was 99 percent for those qualifying for the free $1,000.

“It’s an indicator that investing in your kid’s future and getting some free money is a strong motivator,” said Jason Ewas of the Aspen Institute Financial Security Program.

A $1,000 investment at birth could be worth $6,000 at age 18, the Trump administration has estimated. Charities and governments can contribute to the accounts, in the form of money or public company stock, as can family, friends and employers. So far, donors include Michael and Susan Dell, the billionaire philanthropists who have pledged $250 each for millions of children, and the state of Oklahoma, which is contributing $250 to children’s accounts there. Micron said this week it would deposit $250 for as many as one million children.

About six in 10 Americans own stock, and those who do are likelier to be white, with college degrees and high incomes. The stock market is now the biggest driver of the racial wealth gap, research shows. The wealth gap (in assets like investments, savings and homes) is bigger than the income gap.

“Families who do not file taxes, have limited digital access, or are less comfortable navigating financial systems are therefore more likely to be left out,” said Stephen Roll, research director at the Center for Social Development at Washington University in St. Louis. “Those are likely to be the families with the lowest incomes and the highest need for programs like this.”

All these factors — in addition to a greater mistrust of Mr. Trump by nonwhite Americans and the fact that high earners will have more money to contribute to accounts — suggest that the accounts could end up growing the racial wealth gap and the wealth gap in general.

“I admit that I think they will increase inequality,” said Ray Boshara, a senior policy adviser at Washington University and the Aspen Institute who has helped policymakers in both parties develop plans for children’s savings accounts. “However, I say it’s worth it because that’s the price you pay for getting all families in, low-wealth families in.”

The Trump administration has said it’s a top priority to reach low-income families. Melania Trump, the first lady, recently announced a way for foster children to get accounts.

The accounts “will ensure that every American child can benefit from private ownership and compound growth; that every American baby, in short, is born a shareholder,” Treasury Secretary Scott Bessent said last month.

According to the law, money in Trump accounts will be invested in low-cost index funds. The accounts become I.R.A.s when children turn 18, which means that money can be withdrawn for specific purposes like paying for college, buying a home or retiring (otherwise there is a penalty).

One challenge in reaching more people is awareness. In an online survey of U.S. adults conducted in June and released Thursday by Public First, a polling firm, only about 20 percent of respondents said they knew what Trump accounts were, and another 30 percent said they had heard of them but couldn’t explain what they were.

Those earning less than $25,000 were the least likely to know what Trump accounts were — just 11 percent did.

The Trump administration has outreach plans, including partnering with community groups and putting up billboards in areas that are underrepresented. There was a Super Bowl ad, and some states, including Oklahoma, are incorporating Trump accounts into their financial literacy curriculums.

Another challenge is the name (they were originally called Invest America accounts). Though the policy idea has bipartisan support, naming the accounts after Mr. Trump has turned away some participants, research has found. (The tax form to sign up is 4547, almost certainly a nod to Mr. Trump’s presidencies.)

In interviews by Commonwealth, a nonprofit that aims to help low-income people build wealth, respondents have said the name is polarizing, with some expressing hesitation or mistrust because of it. Parents were more likely to sign up if their children were eligible for the $1,000, Commonwealth found.

In the Public First survey, a majority said they supported child savings accounts, whether they said they had voted for Mr. Trump or for Kamala Harris. But when the same question was asked with the name Trump accounts, just 37 percent of Harris voters supported them, compared with 69 percent of Trump voters.

Perhaps most important to reaching the most children, many researchers say, is automatic enrollment, as happens with many employer-sponsored retirement savings plans.

Now, parents have to fill out a form or check a box on their tax returns to open a Trump account. Past experiments with similar children’s savings accounts, in Maine and Oklahoma, have found that when they require parents to sign up, a minority do, and poor families are least likely to. But when children are automatically enrolled, with parents given the chance to opt out, almost none do.

“Without auto-enrollment, you’re going to miss a lot of low-income kids,” Mr. Boshara said.

The Trump administration has considered auto-enrollment, according to a Treasury Department official who was not permitted to speak publicly. But there are hurdles, including privacy laws restricting sharing identifying information across government agencies.

The program for foster children — which enables states to open accounts on their behalf — could provide a template.

Another consideration, the Treasury official said, is that because there are administrative costs for the government to open accounts, it would be inefficient to auto-enroll children whose families may never add private contributions, or who are older and stand to benefit less from compounding returns.