Republican senators pushed government intelligence officials to better guard Americans from national security threats, including Hamas terrorists, who could seek to enter the United States under the Biden administration.

Sens. Tom Cotton (R-AR) and Joni Ernst (R-IA) raised significant concerns during a Senate Armed Services Committee hearing Thursday that the Biden administration’s reported plan to accept refugees from Gaza, in particular, could open the U.S. to bigger problems despite existing screening and vetting protocols for immigrants.