Traci Mumford

First, the Trump administration announced a major change to how people can get green cards.

Green cards give immigrants the right to live in the U.S.

permanently.

And right now, most people who get them are already in the country, often for school, work, or because they've married a U.S.

citizen.

Now, though, the administration says most people will have to go back to their home countries to apply.

This could potentially affect the lives of hundreds of thousands of people and split up families for months or even years.

The administration said the change is meant to help stop people whose green card applications are denied from covertly staying in the country illegally.

It said some people would still be allowed to apply from the U.S., but only under extraordinary circumstances.

The announcement immediately set off confusion and chaos as immigration lawyers scrambled to understand exactly who will be affected, and many expect the change to be met with legal challenges.

also in Washington.

For the third time in a month, Secret Service officers exchanged fire with a gunman while President Trump or his vice president were nearby.

The latest instance happened Saturday when a man approached the White House, pulled a gun from a bag, and opened fire.

Trump was inside at the time.

Secret Service officers fatally shot the man, a 21-year-old who'd been arrested near the White House before.

A bystander was also injured.

Officials said on Sunday he was in stable condition.

This comes after Secret Service wounded a gunman at the National Mall near the route of a motorcade for Vice President J.D.

Vance, and after agents exchanged fire with a man at the White House Correspondents' Dinner.

Trump seemed to use the incident on Saturday to renew his argument for a new secure ballroom at the White House, writing on social media that it highlighted the need for the, quote, most safe and secure space of its kind ever built in Washington.