FILE - In this Wednesday, Oct. 22, 2014 file photo, Ebola coordinator Ron Klain listens as President Barack Obama speaks to the media about the government's Ebola response in the Oval Office of the White House in Washington. Joe Biden has chosen his longtime adviser Ron Klain to reprise his role as his chief of staff, installing an aide with decades of experience across. That's according to a person familiar with the decision who spoke to The Associated Press on Wednesday, Nov. 11, 2020 on condition of anonymity to avoid preempting an official announcement.(AP Photo/Jacquelyn Martin, File)

A supporter of President Donald Trump holds a Trump 2020 flag outside the U.S. Capitol building as they attend pro-Trump marches, Saturday Nov. 14, 2020, in Washington. (AP Photo/Jacquelyn Martin)

President Donald Trump arrives to speak in the Rose Garden of the White House, Friday, Nov. 13, 2020, in Washington. (AP Photo/Evan Vucci)

President Donald Trump speaks in the Rose Garden of the White House, Friday, Nov. 13, 2020, in Washington. (AP Photo/Evan Vucci)

President Donald Trump, center, plays golf at Trump National Golf Club in Sterling, Va., as seen from the other side of the Potomac River in Darnestown, Md., Sunday, Nov. 15, 2020. (AP Photo/Manuel Balce Ceneta)

President Donald Trump, left, gesturing while playing golf at Trump National Golf Club in Sterling, Va., as seen from the other side of the Potomac River in Darnestown, Md., Sunday, Nov. 15, 2020. (AP Photo/Manuel Balce Ceneta)