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)
Democratic presidential candidate former Vice President Joe Biden's running mate Sen. Kamala Harris, D-Calif., removes her face mask as she prepares to speak at the Hotel DuPont in Wilmington, Del., Thursday, Aug. 13, 2020. (AP Photo/Carolyn Kaster)
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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)