In this Sept. 30, 2020, file photo, President Donald Trump throws hats to supporters after speaking at a campaign rally at Duluth International Airport in Duluth, Minn. President Trump and first lady Melania Trump have tested positive for the coronavirus, the president tweeted early Friday. (AP Photo/Alex Brandon, File)

In this July 27, 2020, file photo, President Donald Trump wears a face mask as he participates in a tour of Bioprocess Innovation Center at Fujifilm Diosynth Biotechnologies in Morrisville, N.C. President Donald Trump and first lady Melania Trump have tested positive for the coronavirus, the president tweeted early Friday. (AP Photo/Evan Vucci, File)

In this Sept. 26, 2020, file photo, President Donald Trump speaks during a campaign rally at Harrisburg International Airport in Middletown, Pa. President Trump and first lady Melania Trump have tested positive for the coronavirus, the president tweeted early Friday. (AP Photo/Steve Ruark, File)

In this Sept. 29, 2020, file photo, President Donald Trump holds out his face mask during the first presidential debate at Case Western University and Cleveland Clinic, in Cleveland, Ohio. President Donald Trump and first lady Melania Trump have tested positive for the coronavirus, the president tweeted early Friday. (AP Photo/Julio Cortez, File)