President Donald Trump has signed a flurry of executive actions on Day 1. He has repealed dozens of former President Joe Biden’s actions, begun his immigration crackdown, withdrawn the U.S. from the Paris climate accords and sought to keep TikTok open in the U.

Here’s what an executive order is, who can overturn it and how and a list of 12 impactful executive orders President Trump signed on Jan. 20, 2025.