Former President Joe Biden on Friday backed former Atlanta mayor Keisha Lance Bottoms' campaign for governor in Georgia, his first endorsement since leaving office last year. "I've known her for a long time, and she's something special," Biden said in a video backing the former mayor, who served as a senior adviser in the Biden administration. Biden added in the video that the "same qualities that made her a great mayor made her invaluable to our administration." He called Bottoms "smart" and "focused" and said she "gets things done." "Georgia, she's ready. She's been ready," said the former president, who included Bottoms on a short list of potential vice presidential running mates in 2020. Bottoms is running in a crowded Democratic primary field, which also includes former Georgia state Sen. Jason Esteves, former state labor commissioner and DeKalb County CEO Michael Thurmond and former Lt. Gov. Geoff Duncan , who served as a Republican but later switched parties.…