President Donald Trump issued a series of executive orders related to immigration on his first day in office, including declaring a national emergency at the border. He made the actions official during a signing at the Oval Office on Monday.

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

Trump signed orders his officials called “common-sense immigration policies.” These include declaring a national emergency at the U.S. southern border, deploying armed forces, border wall construction, ending asylum and ending birthright citizenship to some children born in the U.S., among others.

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,