Barack Obama personally warned President Trump not to hire the disgraced Mike Flynn as his national security adviser, multiple news reports said Monday.

The warning came two days after the election when the pair had a 90-minute sitdown in the Oval Office, NBC News reported, citing three Obama Administration sources.

The revelation came the same day that former Acting Attorney General Sally Yates, a 27-year Justice Department veteran who spent most of her career as a prosecutor, was expected to tell lawmakers that Flynn lied to Team Trump about his contacts with the Russian ambassador.

Obama had fired Flynn in 2014 as chief of the Defense Intelligence Agency for incompetence and questions about his judgement and temperament.

Obama told Trump that he believed Flynn was not up to the job, the network reported.

Trump appeared to be concerned about Yates’ testimony, taking to Twitter Monday morning to accuse her of leaking classified information to the media.

“Ask Sally Yates, under oath, if she knows how classified information got into the newspapers soon after she explained it to W.H. Council [sic],” Trump tweeted about an exchange Yates had with White House counsel Donald McGahn.

He later sent out a second tweet with the correct spelling of McGahn’s title.

Yates and James Clapper, the ex-director of national intelligence who pushed for Flynn’s firing in 2014 from his job, were expected to testify later Monday before the Senate Judiciary Committee.

About a week after Yates told McGahn about Flynn’s Russian contacts, media reports revealed that Flynn had lied to Vice President Pence about talks with the Russian ambassador.

Flynn was then canned by the White House.

Trump in another tweet tried to shift blame for the controversy to Obama.

“General Flynn was given the highest security clearance by the Obama administration, but the Fake News seldom likes talking about that,” he griped.

Flynn at the time said he was fired by the Obama Administration because he did not parrot the party line that ISIS had been defanged and on the president’s hands-off Syria policy.

White House spokesman Sean Spicer said Monday that Flynn was an outspoken critic of Obama so the former president’s warning should not be a surprise.

“It’s true that President Obama made it known he wasn’t exactly a fan of General Flynn which shouldn’t come as a surprise to anyone given that General Flynn had worked for President Obama, was an outspoken critic of President Obama’s shortcomings specifically as it related to lack of confronting ISIS,” Spicer said, adding that if Obama were so concerned he should have suspended Flynn’s security clearance.