How precisely Donald Trump could make good on his threat to annex Canada can be found in the U.S. Constitution. There is both potential and precedent in American history.

President-elect Trump on Tuesday again suggested that Canada ... with "United States" written across the two countries and another post with the U.S. and Canada covered in an American Flag.

Here are some things to know about Trump’s actions, the counters from U.S. trading partners and what it means for American ...