Biden says it's 'much too early' to make decision about running again, opening door to chance he might not seek reelection in 2024 - CNN

But Biden acknowledging publicly that he is undecided -- as his wife, first lady Jill Biden, did in an interview last week -- injects fresh questions into the 2024 race.

And within the timeframe that makes sense after this next election cycle here, going into next year, make a judgment on what to do," Biden told CBS.

Asked about criticisms that he is unfit for the job at his age, Biden said to his critics: "Watch me."

"I respect the fact that people would say, you know, 'You're old.' And -- but I think it relates to how much energy you have, and whether or not the job you're doing is one consistent with what any person of any age would be able to do," Biden said, adding that he's mentally focused on the job.

He hasn't observed anything in terms of "things I don't do now that I did before, whether it's physical, or mental, or anything else," Biden added.

Asked about his recent string of legislative successes as of late, Biden quipped: "How'd an old guy do that?"

But when asked previously about running, Biden gave a firmer answer.