Mike Bloomberg is still considering a 2020 run — if Joe Biden’s campaign implodes, according to a new report.

The CNBC report comes just days after The Post revealed that TV’s “Judge Judy” said the billionaire would be a “perfect presidential candidate.”

The former mayor in March announced he would not run for president because he believed it would be difficult for him to prevail in a Democratic primary. He also saw former Vice President Biden as a viable moderate voice.

But a CNBC report Monday claims Bloomberg is reconsidering after seeing Biden stumble and lose ground to Elizabeth Warren.

A Bloomberg run is premised on Biden withdrawing from the race, however, sources told the outlet — and that is unlikely, at least through the early voting contests. A Bloomberg spokesman had no immediate comment.

A longtime Bloomberg insider told The Post the mogul’s campaign network has not been reactivated to prepare for a White House run. The source said the CNBC story was the first he’d heard of it.