Hours after taking office, President Donald Trump announced stringent new immigration measures, declaring a national emergency at the US-Mexico border and vowing to send troops to address what he called a "disastrous invasion" of the country. Trump also moved to revoke birthright citizenship for children born in the U.S. to non-citizen parents, a move that is expected to face significant legal challenges.

In a controversial press conference, Trump emphasized his desire for legal immigration but argued that the U.S. must take action to halt illegal immigration. The new policies included ending the practice of granting asylum and reinstating the "Remain in Mexico" policy, which forces asylum seekers to wait in Mexico while their applications are processed.

The new policies quickly took effect, with an app designed to help asylum seekers going offline and tens of thousands of scheduled appointments being canceled. Trump's administration also signaled plans to pursue the death penalty for non-citizens committing capital crimes.

Trump's announcement marks a sharp shift from previous policies under President Biden, focusing on stricter border security and measures against illegal immigration.