But they wouldn't all immediately lose their status. Instead, the process of expirations will continue for more than two years if Congress fails to act within six months, as President Trump has demanded.
Trump announced that his administration would grant no new applications for DACA if they were received after September 5 and would let existing two-year permits expire. But the administration is also allowing anyone whose permits expire in the next six months a brief window to renew, a move designed to give Congress time to act before any DACA status is actually lost.
So what would a DACA phase-out look like for the hundreds of thousands of people enrolled if lawmakers don't meet their deadline?
As many as 983 undocumented people previously covered under DACA would lose their protected status every day -- nearly 30,000 people a month, on average, for the two years following the six-month delay in the termination of the program, according to a CNN analysis of Department of Homeland Security data.