As many Americans are trying to figure out what kind of president they have just elected, the people of Balmedie, a small village outside the once oil-rich city of Aberdeen, say they have a pretty good idea. In the 10 years since Mr. Trump first visited, vowing to build “the world’s greatest golf course” on an environmentally protected site featuring 4,000-year-old sand dunes, they have seen him lash out at anyone standing in his way. They say they watched him win public support for his golf course with grand promises, then watched him break them one by one.

A promised $1.25 billion investment has shrunk to what his opponents say is at most $50 million. Six thousand jobs have dwindled to 95. Two golf courses to one. An eight-story, 450-room luxury hotel never materialized, nor did 950 time-share apartments. Instead, an existing manor house was converted into a 16-room boutique hotel. Trump International Golf Links, which opened in 2012, lost $1.36 million last year, according to public accounts.

“If America wants to know what is coming, it should study what happened here. It’s predictive,” said Martin Ford, a local government representative. “I have just seen him do in America, on a grander scale, precisely what he did here. He suckered the people and he suckered the politicians until he got what he wanted, and then he went back on pretty much everything he promised.”

Alex Salmond, a former first minister of Scotland whose government granted Mr. Trump planning permission in 2008, overruling local officials, now concedes the point, saying, “Balmedie got 10 cents on the dollar.”