Former New York City Mayor Michael Bloomberg thinks there's a "55 percent chance" President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE will be reelected in 2020.

Bloomberg, who politically identifies as independent, told New York Times columnist Frank Bruni that he thought Democrats didn't have an effective message to win the 2016 election and could repeat that mistake in 2020.

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“Hillary said, ‘Vote for me because I’m a woman and the other guy’s bad,’ ” Bloomberg said about 2016.

He said Democrats are still looking for issues and messages. And he worries that too many Democrats are eager to jump into the 2020 race.

“They’ll step on each other and re-elect Donald Trump,” Bloomberg said.

Bloomberg endorsed Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE in 2016 and spoke at the Democratic National Convention, calling Trump a "dangerous demagogue."