Trump ended use of a border app to allow migrants to enter the country on two-year permits with eligibility to work, canceling tens of thousands of appointments into early February for people stranded in Mexico. Nearly 1 million people entered the U.S. at land crossings with Mexico by using the CBP One app.

The change is effective immediately and comes amid a slew of actions as the Trump administration works to make good on promises to crack down on illegal immigration and carry out the largest mass deportation effort in U.