EXCLUSIVE — House Republicans are pressing the Biden administration to provide information about a government phone app that allowed immigrants outside the United States to apply for permission to fly into the U.S. to be screened for admission.

In a letter sent to President Joe Biden and Department of Homeland Security Secretary Alejandro Mayorkas on Friday, 18 GOP lawmakers demanded information on the “advanced travel authorizations” program that has allowed immigrants from Cuba, Haiti, Nicaragua, and Venezuela to enter the U.S.