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

The Trump administration Monday ended the use of a border app called CBP One that has allowed nearly 1 million people to legally enter the United States with eligibility to work. A notice on the website of Customs and Border Protection Monday just after Trump was sworn in let users know that the app that had been used to allow migrants to schedule appointments at eight southwest border ports of entry is no longer available.

President-elect Donald Trump has promised to crackdown on illegal immigration starting as soon as the first day of his second term. Meanwhile, a new bill recently filed in the Texas Senate would make it easier for new border wall segments to be built in the Lone Star State.