WASHINGTON - Newly sworn-in U.S. President Donald Trump said on Monday that he would declare illegal immigration a national emergency, send troops to the U.S.-Mexico border, and reinstate his "remain in Mexico" policy as part of a sweeping immigration crackdown.

By Ted Hesson, Steve Holland WASHINGTON (Reuters) -President-elect Donald Trump plans to launch a sweeping immigration crackdown on Monday that directs military troops to assist with U.S.-Mexico border security,

As part of sweeping plans to change immigration in the United States, the Trump Administration has removed functionality from the CBP One app, a US Customs and Border Protection app used by asylum seekers to pursue legal admission into the US along the southwest border.