Trump has long proposed raising tariffs—or taxes on imported goods that the businesses importing them pay the U.S. government—before the election, and said in November he’ll impose a 25% tariff rate on all imports from Mexico and Canada on the first day of his presidency and will impose an additional 10% tariff rate on all imports from China on top of other tariffs.

The new movement could lead to huge economic losses for the United States. Canada is the top source of international visitors to the U.S., and even a 10% reduction in Canadian travel to the U.S. could translate to $2.1 billion in lost spending and 14,000 job losses, according to the U.S. Travel Association.