Biden talks about passing torch in address

Biden briefly spoke with reporters as he boarded Air Force One at Dover Air Base on Tuesday.

The president, who tested negative for COVID-19, said he was "feeling well," and didn't respond to questions about bowing out of the race.

Biden had a mask in hand, which he placed in his pocket after he got out of the car before getting on the plane.

The president gave a salute and a thumbs up as he boarded.

Click here for a list of the current Democrats who support her, and a few notable figures who haven't yet.

Senate Majority Leader Chuck Schumer and House Speaker Hakeem Jeffries have endorsed Vice President Kamala Harris as the party's nominee.

"We are brimming with excitement, enthusiasm and unity," Schumer said as he announced that Harris would be the candidate. "She said she would work to earn the support of our party and boy did she do so, in quick order."

The majority of House and Senate Democrats quickly endorsed Harris after President Biden announced he'd abandon his campaign for a second term on Sunday. While both leaders had said they'd spoke to Harris, they had not offered formal endorsements until Tuesday.

The White House has just sent details on two upcoming trips, one for Vice President Kamala Harris this week and one for President Joe Biden next week.

Harris will travel to Indianapolis on Wednesday to attend the biennial convention of one of the nation's largest historically Black sororities. This will be on the heels of her visit to Milwaukee today.

Biden will travel to Austin next Monday, July 29 -- a rescheduled visit to the LBJ Presidential Library for the 60th Anniversary of the Civil Rights Act. The president didn't go last week, as originally scheduled, in the aftermath of the assassination attempt.