President Donald Trump’s policies could cost the U.S. economy $90 billion this year in lost tourism and export revenue, according to analysts at Goldman Sachs. Many foreign visitors are avoiding the U.S. over concerns about increased hostility at the border, including reports about European tourists being detained for weeks in U.S. immigration centers. Others are angry about Trump’s trade wars and his treatment of U.S. allies—particularly Canada—and are boycotting U.S. travel and products. Last month, international visits were down 10 percent compared to a year earlier, even though the U.S. was originally expecting to welcome a near record 77 million foreign visitors this year. Canadian flight reservations for the summer tourist season are down an incredible 70 percent after Trump has repeatedly threatened to annex the country and make it the 51st American state. Some hotel groups are also reporting a 25 percent drop in bookings from European travelers. Almost $20 billion in retail spending from international visitors could be at risk.