MSNBC host Chuck Todd scolded William Barr on Wednesday after the attorney general testified on Capitol Hill that he believes President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's campaign was spied on in 2016, saying he "gaslit the country."

"The country’s chief law enforcement officer went in front of Congress and gave credence to a factless conspiracy theory," Todd said on "Meet the Press Daily."

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“Using the word 'spying' plays into the president’s language that the Russia investigation to him is just a witch hunt. Every time they’ve brought up this allegation, there has been zero factual basis for it," he continued. "Every effort to perpetuate the spying conspiracy theory has been debunked.”

“It doesn’t matter what the truth is, does it?" Todd later asked. "I mean, I hate to say this now, but that’s the whole point. It feels like that basically the attorney general gaslit the country.”

Barr, who also served as attorney general under President George H.W. Bush, told a Senate committee on Wednesday that he thought the FBI was spying on the Trump campaign, drawing a harsh reaction from Democrats.

“I think spying did occur,” Barr told Sen. Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE (D-N.H.). “But the question is whether it was adequately predicated.”

Speaker Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.) later accused Barr of serving the president instead of the country, adding that the attorney general had "gone off the rails."

"Let me just say how very dismaying and disappointing that the chief law enforcement officer of our country is going off the rails yesterday and today,” Pelosi told reporters as a Democratic retreat in Leesburg, Va.

Barr also told lawmakers he is wary regarding why the Trump campaign was not notified about the FBI’s counterintelligence investigation.

“That is one of the questions I have, that I feel normally the campaign would have been advised of this,” Barr told Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.).