Hours after Trump’s inauguration, his administration canceled appointments allowing migrants to enter the U.S. to request asylum, leaving many of them stranded on the U.S.-Mexico border.

The Laken Riley Act would require federal officials to detain immigrants who are in the country illegally and who are caught committing crimes including theft.

Immigration officials are already taking action along the Texas-Mexico border. The American Civil Liberties Union has already filed at least one lawsuit.