The “Trump slump” has struck again.

The Toronto District School Board, the largest school board in Canada and one of the largest in North America, won’t approve new school trips to the U.S. in the 2017-2018 school year because of risks that certain students will be turned away by U.S. Customs officials. “We strongly believe that our students should not be placed into these situations of potentially being turned away at the border,” the board’s director of education John Malloy said in a statement Thursday. “It is my hope that our students, staff and parents will understand and support this difficult decision.” The board represents around 246,000 students from 584 schools. Trips already approved will go ahead.

This follows a similar policy by the Girl Guides of Canada, who said earlier this month that the decision to cancel all trips to the U.S. until further notice. The organization said the decision was not political, but cited recent changes to U.S. border entry rules. This decision was not made lightly,” it said in a statement. “Travel is a unique part of the Girl Guide program and girls spend well over a year leading the planning and fundraising for their travel experiences. Our primary goal was to reduce the risk of our members encountering difficulties at the border and ensuring that no girl is left behind.” It said it hoped members would consider alternative destinations.

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Earlier this month, President Trump issued a revised travel ban placing restrictions on visitors from six Muslim-majority countries from entering the U.S. Like a similar executive order he signed in February, this was also blocked by a federal court judge. In his ruling last week, U.S. District Judge Derrick Watson said it mattered that Trump as a candidate had called for a ban on the entry of Muslims into the U.S. Such statements “betray the Executive Order’s stated secular purpose.” A federal appeals court agreed to fast-track President Trump’s revised executive order, which bans U.S. entry for people from six Muslim-majority countries. It set oral arguments for May 8.

Spending on travel and tourism in the U.S. fell 3.3% on the year to $1.7 trillion in the fourth quarter of 2016, after rising 3.7% in the previous quarter, according to figures released the “Travel and Tourism Satellite Accounts” of the Bureau of Economic Analysis, a government data agency. The biggest component of the downturn was air travel, which fell 15% after increasing 2% in the previous quarter. However, some travel experts say the slump is due to prices rather than politics. Tourism prices increased 9.1% in the fourth quarter of 2016 from just 0.1% in the third quarter, the data found, which also appeared to have an impact on jobs.