President Trump began his pledge to give America a MAGA makeover Monday, taking a slew of executive actions to walk back Biden-era policies and fulfill bold campaign promises. The big picture: Trump's radical expansion of executive power will dramatically change life for millions of people if the orders withstand the barrage of legal challenges that are already coming.

One of the many executive orders President Donald Trump signed on Monday included one to end birthright citizenship. Here's what to know about it and why lawsuits have already been filed.