The Latest: Trump in debate prep before faceoff with Biden President Donald Trump listens to Democratic presidential candidate former Vice President Joe Biden during the first presidential debate Tuesday, Sept. 29, 2020, at Case Western University and Cleveland Clinic, in Cleveland, Ohio. (AP Photo/Morry Gash, Pool)
A general view of the Health Education Campus of Case Western Reserve University ahead of the first presidential debate between Republican candidate President Donald Trump and Democratic candidate former Vice President Joe Biden, Tuesday, Sept. 29, 2020, in Cleveland. (AP Photo/Julio Cortez)
Democratic vice presidential candidate Sen. Kamala Harris, D-Calif., speaks with members of the media at Trophy Brewing and Pizza during a campaign visit in Raleigh, N.C., Monday, Sept. 28, 2020. (AP Photo/Gerry Broome)
Democratic presidential candidate former Vice President Joe Biden gives a speech on the Supreme Court at The Queen Theater, Sunday, Sept. 27, 2020, in Wilmington, Del. (AP Photo/Andrew Harnik)
President Donald Trump speaks about coronavirus testing strategy, in the Rose Garden of the White House, Monday, Sept. 28, 2020, in Washington. (AP Photo/Evan Vucci)
Democratic presidential candidate former Vice President Joe Biden gives a speech on the Supreme Court at The Queen Theater, Sunday, Sept. 27, 2020, in Wilmington, Del. (AP Photo/Andrew Harnik)
President Donald Trump listens to Democratic presidential candidate former Vice President Joe Biden during the first presidential debate Tuesday, Sept. 29, 2020, at Case Western University and Cleveland Clinic, in Cleveland, Ohio. (AP Photo/Morry Gash, Pool)