Former President Obama's talk about how politics need “new blood†is being seen as a blow to Joe Biden, the former vice president that Obama did not back to succeed him in 2016.
Sources close to both men describe Obama and Biden as friends who share an admiration and respect for one another.
But they also acknowledge recent remarks like the one Obama made this week in Hawaii represent a sort of threat to Biden, who has told allies in recent days that he’s likely to enter the 2020 presidential race.
Obama was speaking broadly about the need for new blood in politics, not specifically the need for new blood in the Democratic Party. But coming on the heels of Obama’s meeting with former Rep. Beto O’Rourke (Texas), a rising Democratic star who most political observers see as competing with Biden for a slice of the primary electorate, it also sent a signal to the wider political world.
https://thehill.com/homenews/administration/424987-obama-new-blood-remark-has-different-meaning-for-biden