Pay Up, Trump President Donald Trump owes New York City upwards of $600 million.

No, this isn’t about some real estate lawsuit or even the cost of securing Trump Tower. This is about reparations for the Trump Slump, which is what some industry experts are calling his negative impact on U.S. tourism.

Between his travel ban, his electronics ban on certain Middle Eastern carriers and a stricter visa application process—which even scrutinizes the social media history of some U.S.-bound travelers—and his rhetoric on Twitter, Trump has made the U.S. a very unwelcoming place for international travelers.

And it’s costing us.

In early March travel analysts at Forward Keys (which tracks 16 million airline bookings a day) reported that international bookings to the U.S. were down 6.5 percent compared with last year—and it’s not just people from Middle Eastern countries who are skipping the United States. In March, airfare search site Hopper reported that flight bookings and searches to the U.S. were down about 10 percent, with 102 of 122 origin countries showing declines.

About 38% of corporate travel professionals in Europe say they are avoiding the U.S., according to a survey the Global Business Travel Association conducted in March. And in only a single week following ban’s announcement, business travel declined by nearly $185 million.

"We've done surveys after terrorism events, when there were high fuel prices, SARS and Ebola outbreaks. This is unlike anything we've ever seen before," executive director Mike McCormick told CNN.

Even Canada’s