The decision is part of a broader crackdown on immigration that critics say violates asylum rights under US law.

The Trump administration is completely repurposing the problematic CBP One phone app that allowed more than a million migrants to flock into the US. The new app will allow migrants to report their details so that they can voluntarily leave the country instead of being thrown out by ICE,

Migrants hoping to avoid harsh consequences can convey their plans to voluntarily leave using a revised mobile app.