WASHINGTON − President Donald Trump on Monday declared a national border emergency and ordered the U.S. armed forces to repel "forms of invasion" at the U.S.-Mexico border, including illegal migration and drug trafficking.

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.

President Donald Trump began his term by taking a series of sweeping immigration executive actions Monday that included declaring a national emergency at the US southern border, immediately ending use of a border app called CBP One that had allowed migrants to legally enter the United States,

President Trump is planning to invoke muscular presidential powers to begin a sweeping crackdown on immigration.

By Ted Hesson and Alexandra Ulmer WASHINGTON/PIEDRAS NEGRAS, Mexico (Reuters) -President Donald Trump on Monday kicked off his sweeping immigration crackdown, tasking the U.S. military with aiding border security,