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.

While the announcement is almost certainly bluster to bring attention to illegal immigration and fentanyl smuggling, there are several reasons why it is so risky.

President-elect Trump's plan to increase tariffs on goods from China and impose them on products from Mexico and Canada would drive inflation up by nearly 1%, Goldman Sachs estimates.