Trump, still infectious, back at White House -- without mask

Dr. Sean Conley, physician to President Donald Trump, center, talks with reporters at Walter Reed National Military Medical Center, Monday, Oct. 5, 2020, in Bethesda, Md. (AP Photo/Evan Vucci)

President Donald Trump stands on the balcony outside of the Blue Room as returns to the White House Monday, Oct. 5, 2020, in Washington, after leaving Walter Reed National Military Medical Center, in Bethesda, Md. Trump announced he tested positive for COVID-19 on Oct. 2. (AP Photo/Alex Brandon)

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)

A member of the cleaning staff sprays The James Brady Briefing Room of the White House, Monday, Oct. 5, 2020, in Washington. (AP Photo/Alex Brandon)

In this image released by the White House, President Donald Trump works in his conference room at Walter Reed National Military Medical Center in Bethesda, Md., Saturday, Oct. 3, 2020, after testing positive for COVID-19. (Joyce N. Boghosian/The White House via AP)

White House press secretary Kayleigh McEnany, talks to the media, Sunday, Oct. 4, 2020, outside the White House in Washington. (AP Photo/Jacquelyn Martin))

White House press secretary Kayleigh McEnany, walks up to be interviewed by Fox News, Sunday, Oct. 4, 2020, at the White House in Washington. (AP Photo/Jacquelyn Martin)

An American flag flies over the White House, Monday, Oct. 5, 2020, in Washington. (AP Photo/Alex Brandon)

President Donald Trump, left, walks out of Walter Reed National Military Medical Center to return to the White House after receiving treatments for covid-19, Monday, Oct. 5, 2020, in Bethesda, Md. (AP Photo/Evan Vucci)

Graphic shows some of those attending a White House event who have been tested for COVID-19;

Karen Simon from the District of Columbia, let, waves a banner together with other supporters of President Donald Trump, gathered outside the Walter Reed National Military Medical Center in Bethesda, Md., Monday, Oct. 5, 2020. Trump said Monday he's leaving the military hospital where he has been treated for COVID-19 and will continue his recovery at the White House. (AP Photo/Manuel Balce Ceneta)