In recent remarks to the press, President Donald Trump restated his intention to impose 25% tariffs on U.S. imports from Mexico and Canada as early as Feb. 1. His reasoning: "vast" illegal immigration and "massive" amounts of fentanyl coming to the U.

Hours after being sworn in, President Trump fulfilled his campaign promises to crackdown on illegal immigration. The President declared an emergency at the southern border, and as a result, there have already been many changes to policy.

Immigration since President Donald Trump's inauguration has been a hot topic. Here's what has happened, and what you need to know.