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.

In his threat to slap hefty tariffs on Canadian and Mexican imports to the U.S., president-elect Donald Trump lumped together the border issues of the two nations. Experts and politicians say it's an apples-to-oranges comparison.

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.