President Donald Trump waves from the top of the steps of Air Force One at Andrews Air Force Base in Md., Friday, July 10, 2020. Trump is heading to Florida to visit Southern Command, attend a roundtable event at a Doral church where he will speak with Cuban and Venezuelan dissidents and attend a fundraiser in Hillsboro Beach. (AP Photo/Susan Walsh)

President Donald Trump listens during a "National Dialogue on Safely Reopening America's Schools," event in the East Room of the White House, Tuesday, July 7, 2020, in Washington. When Trump convened the coronavirus roundtable on how to safely reopen schools, the seats surrounding him were filled with parents, teachers and local health officials. The head of the Centers for Disease Control and Prevention was relegated to secondary seating on the side. It was a telling indication of how Trump has sidelined and undercut federal health experts.(AP Photo/Alex Brandon)

President Donald Trump listens during a "National Dialogue on Safely Reopening America's Schools," event in the East Room of the White House, Tuesday, July 7, 2020, in Washington. (AP Photo/Alex Brandon)