David Axelrod: Bloomberg entry 'not exactly a vote of confidence' in Biden

David AxelrodDavid AxelrodCNN's Axelrod says impeachment didn't come up until 80 minutes into focus group Sanders, Warren appear to have tense moment onstage after debate Warren faces online criticism over past big donor fundraisers MORE, longtime political commentator and former chief campaign strategist for former President Obama, tweeted Thursday night that billionaire Michael BloombergMichael Rubens BloombergSteyer would have owed M more in taxes under lawmakers' proposal: liberal group Majority sees no ties between business experience and political success Fifth congressional Democrat backs Bloomberg in 2020 race MORE's possible entrance into the fray of the Democratic primary was "not exactly a vote of confidence" for former Vice President Joe BidenJoe BidenWarren: Dershowitz presentation 'nonsensical,' 'could not follow it' Bolton told Barr he was concerned Trump did favors for autocrats: report Dershowitz: Bolton allegations would not constitute impeachable offense MORE's campaign.

"This is a thunderclap," Axelrod tweeted.

"And not exactly a vote of confidence from leading moderate in durability of @JoeBiden campaign."

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Bloomberg, the former Mayor of New York, is supposedly preparing paperwork to appear on Alabama's Democratic primary ballot ahead of Friday's deadline. 

A Bloomberg adviser close to the situation said that the 77-year-old has been cogitating on launching a campaign for several weeks, but hasn't definitively decided if he will or not.

Getting his name on Alabama's ballot, however, allows him more time to make the decision.