What we know and what we don't about Trump's COVID illness President Donald Trump supporters cheer outside of Walter Reed National Military Medical Center in Bethesda, Md., before Trump lifted off on Marine One Monday, Oct. 5, 2020. Stepping gingerly, Trump walked out the military hospital Monday night where he has been receiving an unprecedented level of care for COVID-19, immediately igniting a new controversy by declaring that despite his illness the nation should fear the virus that has killed more than 210,000 Americans. (AP Photo/Jose Luis Magana)
Walter Reed National Military Medical Center is seen through a fence in Bethesda, Md., Monday, Oct. 5, 2020. President Donald Trump was admitted to the hospital after contracting the coronavirus. (AP Photo/Cliff Owen)
White House press secretary Kayleigh McEnany, is interviewed by Fox News, Sunday, Oct. 4, 2020, at the White House in Washington. (AP Photo/Jacquelyn Martin)
Dr. Sean Conley, physician to President Donald Trump, briefs reporters at Walter Reed National Military Medical Center in Bethesda, Md., Saturday, Oct. 3, 2020. Trump was admitted to the hospital after contracting the coronavirus. (AP Photo/Susan Walsh)
Walter Reed National Military Medical Center is seen in the background as deflated ballons hang on the Center's fence, in Bethesda, Md., Monday, Oct. 5, 2020. President Donald Trump was admitted to the hospital after contracting the coronavirus. (AP Photo/Cliff Owen)
A sign on the fence, at the entrance, to Walter Reed National Military Medical Center in Bethesda, Md., Monday, Oct. 5, 2020. President Donald Trump was admitted to the hospital after contracting the coronavirus. (AP Photo/Cliff Owen)
A supporter of President Donald Trump crosses the street near an entrance to Walter Reed National Military Medical Center in Bethesda, Md., Sunday, Oct. 4, 2020. Trump went to the hospital Friday after testing positive for COVID-19. (AP Photo/Cliff Owen)
In this image from video, President Donald Trump drives past supporters gathered outside Walter Reed National Military Medical Center in Bethesda, Md., Sunday, Oct. 4, 2020. Trump was admitted to the hospital after contracting COVID-19. (AP Photo/Phillip Crowther)
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President Donald Trump supporters cheer outside of Walter Reed National Military Medical Center in Bethesda, Md., before Trump lifted off on Marine One Monday, Oct. 5, 2020. Stepping gingerly, Trump walked out the military hospital Monday night where he has been receiving an unprecedented level of care for COVID-19, immediately igniting a new controversy by declaring that despite his illness the nation should fear the virus that has killed more than 210,000 Americans. (AP Photo/Jose Luis Magana)