Sen. Marco Rubio asked the Biden administration to explain how it will secure the U.S.-Mexico border in the event that terrorists released by the Taliban from prisons in Afghanistan attempt to sneak in.

The Florida Republican asked Homeland Security Secretary Alejandro Mayorkas on Tuesday to provide a full accounting of the steps taken by the department over the past week to shore up the southern border, where thousands of federal agents have been pulled from the field to care for a soaring number of migrant families in custody.