President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Wednesday lauded William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE in his first reaction to the attorney general’s appearance at a tense Senate hearing on the special counsel’s Russia investigation.

"I heard that the attorney general was really, really solid and did a great job today," Trump said during an interview with Boston Herald Radio.

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During the Senate Judiciary Committee hearing, Barr defended his handling of Robert Mueller’s report on the probe amid grilling from Democratic senators who accused him of botching its release and tipping the scales in favor of the White House.

Democrats seized on a letter Mueller sent to Barr in late March criticizing the attorney general’s four-page memo summarizing the report’s findings. Some even called on Barr to resign following the hearing.

But Trump said he thinks the Democrats "are very devastated because they looked at the report and there was absolutely no collusion and there’s no obstruction either, and they were hoping against hope because that’s the only way they could actually get lucky."

He also took aim at Sen. Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.), who is running for the Democratic presidential nomination in 2020 and was among those who called on Barr to step aside.

"I think it’s ridiculous. She defrauded the public for a long time, and she should really be the one to resign," Trump said.