As the list of nations issuing travel warnings to the US grows, some visitors are opting to boycott it entirely. Here's why many foreigners are changing their travel plans and what this could mean for Americans.

As President Donald Trump implements sweeping new policies, issues tariffs on longtime allies and leads an immigration crackdown, some international travellers are rethinking their travel plans to the US.

The nation's stricter border enforcement has recently led to the detention of Canadian and European tourists, prompting Germany, the UK, Denmark, Finland and Portugal to issue travel warnings and advisories for the country. Now, it appears that a growing number of voices are advocating for an all-out boycott of travel to the US.

The cold shoulder has been particularly noticeable from the US's northern neighbour, Canada, which sends more than 20 million visitors to the country per year – more than any other nation. In response to Trump's proposed tariffs and repeated threats to annex the nation, former prime minister Justin Trudeau recently urged his fellow Canadians: "Now is the time to choose Canada," adding, "it might mean changing your summer vacation plans to stay here in Canada."

The appeal seems to have caught on, as many infuriated Canadians are now boycotting US holidays. In February, border crossings were down by more than 20%, according to Statistics Canada. The US Travel Association estimates that even a 10% reduction in Canadian visitors could result in $2.1bn in lost spending and 14,000 job losses.

While some Canadians are snubbing the US because of policy changes, others say they simply don't feel as safe as they once did.

"My partner and I decided not to go ahead with our planned vacations to the US this year," said Canadian travel journalist Kate Dingwall. "I worry about the border and getting stuck somehow, especially with how prickly Trump is to Canada. There's just a sense of uneasiness around visiting America at the moment."

Keith Serry, a writer and comedian based in Montreal, Quebec, cancelled five April appearances in New York City (including four shows at the upcoming New York City Fringe festival) due to the tense political situation.

"This decision will, of course, rob me........

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