President-elect Donald Trump has threatened tariffs of 25% on imports from Canada and Mexico until fentanyl and undocumented migrants stop flowing over US borders. Canada says it has a plan to boost border security — and points to US government data that show most of the problems come from Mexico.

Trump border czar calls northern border ‘extreme national security vulnerability’ and says it ‘can’t be a gateway to terrorists coming to the United States’

The president-elect said that he would impose the across-the-board tariffs on Day 1 and that they would stay in place until Canada, Mexico and China halted the flow of drugs and migrants.