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... At first, it seemed like it might work, said Patrick Kaler, CEO of the local tourism organization Visit Buffalo Niagara. More than 1,000 people entered the giveaway. But by the end of July, it was clear the city's reliable summer wave of Canadian visitors would not arrive this year.

Buffalo's struggle reflects a broader downturn in international tourism to the U.S. that travel analysts warn could persist well into the future. From northern border towns to major hot spots like Las Vegas and Los Angeles, popular travel destinations reported hosting fewer foreign visitors this summer.

Experts and some local officials attribute the trend that first emerged in February to President Donald Trump's return to the White House. They say his tariffs, immigration crackdown and repeated jabs about the U.S. acquiring Canada and Greenland alienated travelers from other parts of the world. ...