The Trump administration is revoking the protected status of nearly one million people who have entered the U.S. using an app created by the Biden administration that allowed them to enter the country first and then schedule a court hearing on their legal status. 

The revocations are being handled by the Department of Homeland Security and impact an estimated 985,000.

"The Biden Administration abused the parole authority to allow millions of illegal aliens into the U.S., which further fueled the worst border crisis in U.S. history," the department told The Hill newspaper on Tuesday. "Canceling these parolees is a promise kept to the American people to secure our borders and protect national security."

Those who entered through the app, went to court and whose asylum requests are still pending should not be impacted by the administration's new effort, according to CBS News.

The administration has begun sending email notices to the people affected by the recent decision, telling them to leave the country. President Donald Trump suspended the CBP One app on the first day in office, and has replaced it with his own app, CBP Home, that allows people to self-deport.

The Hill reported that the recent decision did not impact migrants from Ukraine and Afghanistan. 

Homeland Security previously revoked parole for people from Cuba, Haiti, Nicaragua and Venezuela, who also sought parole through the CBP One app so long as they could also secure a U.S.-based financial sponsor. Over 500,000 people affected by that revocation will lose their status on Apr. 24.