Senator Gary Peters, D-Mich., questions Department of Homeland Security Acting Secretary Chad Wolf during a Senate Homeland Security and Governmental Affairs Committee hearing to examine Department of Homeland Security personnel deployments to recent protests on Thursday, Aug. 6, 2020, in Washington. (Toni Sandys/The Washington Post via AP, Pool)

Photographs of soldiers are clipped to the backpack of Terry Sharpe, center, known as the "Walking Marine" as he is greeted by President Donald Trump, second from right, Veterans Affairs Secretary Robert Wilkie, left, and Karen Pence, the wife of Vice President Mike Pence, right, at the White House in Washington, Monday, July 27, 2020. Sharpe has walked from Summerfield, N.C., to Washington to raise awareness of the current veteran suicide rate. (AP Photo/Andrew Harnik)

President Donald Trump speaks at a news conference in the James Brady Press Briefing Room at the White House, Thursday, Aug. 13, 2020, in Washington. (AP Photo/Andrew Harnik)

FILE - In this July 31, 2020, file photo, letter carriers load mail trucks for deliveries at a U.S. Postal Service facility in McLean, Va. The success of the 2020 presidential election could come down to a most unlikely government agency: the U.S. Postal Service. (AP Photo/J. Scott Applewhite, File)