Chad Wolf, the acting secretary of the Department of Homeland Security, speaks at DHS headquarters on Wednesday. A DHS official has filed a formal whistleblower complaint alleging that Wolf told him to stop reporting on Russian threats to the November election. DHS says the allegation is false.

Department of Homeland Security Acting Secretary Chad Wolf speaks during an event at DHS headquarters in Washington, Wednesday, Sept. 9, 2020. (AP Photo/Susan Walsh)