HUNG YEN PROVINCE, Vietnam — When officials in the home province of Vietnam’s top leader went door to door recently, pressing residents to sign letters agreeing to the Trump Organization’s plans for a new golf community, Le Van Truong wanted to refuse.

Planning documents promised a “new benchmark in luxury, recreation and business.” Truong, 54, pictured something else: the uprooting of a cemetery with five generations of his ancestors and the loss of rich farmland that has sustained local families for centuries.

Yet, he signed anyway because, as he put it, “there’s nothing I can do.”

“Trump says it’s separate — the presidency and his business,” Truong said. “But he has the power to do whatever he wants.”

This $1.5 billion golf complex outside the capital, Hanoi, as well as plans for a Trump skyscraper in Ho Chi Minh City are the Trump family’s first projects in Vietnam — part of a global moneymaking enterprise that no family of a sitting U.S. president has ever attempted on this scale.

As that blitz makes the Trumps richer, it is distorting how countries interact with the United States.

To fast-track the Trump development, Vietnam has ignored its own laws, legal experts said, granting concessions more generous than what even the most connected locals receive. Vietnamese officials, in a letter obtained by The New York Times, explicitly stated that the project required special support from the top ranks of the Vietnamese government because it was “receiving special attention from the Trump administration and President Donald Trump personally.”

And Vietnamese officials have waved the development along in a moment of high-stakes diplomacy. They face intense pressure to strike a trade deal that would head off Trump’s threat of steep tariffs, which would hit about 30% of Vietnam’s exports.

Eric Trump, the president’s second son, stands at the center of the drama. He was in Vietnam to break ground for the golf project Wednesday, less than a year after meeting a local building partner, Dang Thanh Tam. Inside a tent with a gold facade, Eric Trump told guests, including the country’s prime minister, that “the Trump family is going to make you very, very proud.”

The White House said, in an emailed statement: “All of the president’s trade discussions are totally unrelated to the Trump Organization.” It argued that there are no ethical issues as the president’s family develops about 20 Trump-branded properties worldwide because the president’s sons run the businesses. But the president’s financial disclosure report shows that he still benefits financially from most of these ventures.

Eric Trump, who did not respond to interview requests, has insisted that he is just doing his job, developing properties. Vietnamese officials say prioritizing Trump projects assists the country’s economic rise.

But as the deal-making accelerates and collides with U.S. threats to free trade, the line between Trump the president and Trump the tycoon is now seen by diplomats, trade officials and corporations worldwide as so obviously blurred that governments feel more compelled than ever to favor anything Trump-related.

While other Trump deals are happening in Serbia, Indonesia and the Middle East, Vietnam has become a case study for how the Trump brand wields influence and gains advantage, challenging local norms and encouraging leaders to rush approvals, to please the Trump family.

With trade talks intensifying, Vietnamese officials have allowed the Trump project to break ground without completing at least a half-dozen required steps, from securing all land and financing to doing environmental reviews.

The process usually takes two to four years. But records show that initial planning documents were filed only three months before Wednesday’s event, held on newly leveled land under an archway announcing “THE GROUNDBREAKING CEREMONY OF TRUMP INTERNATIONAL, HUNG YEN.”

Vietnam’s Foreign Ministry did not respond to questions on the project’s legality.

Residents, who gathered outside the development site to watch the groundbreaking, were kept at a distance by police. Many worry that their livelihoods and land will soon be taken. Fifty years after the end of a brutal war with the United States, they say they fear becoming collateral damage as the fast, rule-defying approach of Trumpism marches on.

In Vietnam’s communist system, all land is owned by the people and managed or leased out by the state. Most of the property for the golf project is still controlled by families with long-term rights of use. In the Khoai Chau district of Hung Yen province — where the Trump project will take up nearly 4 square miles along the Red River — a sense of betrayal has been rumbling.

At town-hall meetings in early April, officials told hundreds of residents that the best they could expect was about half of what their land would have sold for even before the golf project was announced in October.

Amid a chorus of outrage at one meeting, nearly everyone stormed out. Word of the offered rate spread through streets and into the fields. Opposition has hardened as farmers fear losing investments in saplings that take years to mature and the security that the land has provided for generations.

“They’re not listening to us,” Le Thi Thanh, 57, said on a recent fever-hot afternoon, squatting to graft young custard apple trees. “They just come here and impose their will.”

Vietnam’s construction approval process is supposed to begin with independent scrutiny in the public interest at the district and provincial level. In reality, as interviews and government documents show, little of that happened, and planning laws have been shoved aside.

After the March 20 letter from provincial officials that said the project needed special treatment, the government cut short public comment and did not follow the usual rules on using public funds for preliminary research, documents show. Legal experts said the project is in conflict with the province’s housing master plan. The entire complex, with Trump-designed villas and 36 holes of golf in one of four development zones, would add 35,000 residents, theme parks and an urban commercial district.

On May 15, just over three months after the first official filing, Vietnam’s central government ended the planning process early, to allow for investment and a groundbreaking event that would — as the letter in March had requested — align with Eric Trump’s availability and avoid “missing the window to capitalize on the support of the Donald Trump administration.”