The former publisher of the National Enquirer testified Monday before the grand jury that’s hearing evidence against former President Donald Trump in the Stormy Daniels “hush money” probe, The Post has learned.

David Pecker made his second appearance before the panel after being one of the first witnesses to testify in January, a source familiar with the matter said.

The grand jury isn’t expected to vote before the end of the day and isn’t scheduled to return on Tuesday, meaning a potential indictment won’t be handed up before Wednesday, at the earliest.

Pecker was a key player in the “catch-and-kill” payment to former Playboy model Karen McDougal, in which the Enquirer bought the publishing rights to her claim that she — like Daniels — had an affair with Trump before he became president.

The Enquirer never reported McDougal’s allegations but its parent company, American Media Inc., featured her in other publications.

Trump has denied having sex with either woman.

This is a developing story, check back for updates