Today, the Senate confirmed Alejandro Mayorkas to head the Department of Homeland Security (DHS). The USCIS operates under the DHS. Secretary Mayorkas is the first confirmed leader of DHS in almost 2 years as President Trump refused to send his interim appointees in front of the Senate. Secretary Mayorkas was previously the head of USCIS during the Obama Administration. For more information on Secretary Mayorkas, here is a good summary.