Fox News’s senior political analyst brushed off President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE’s most recent Twitter attack against special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE, in which the president compared Mueller to former Sen. Joseph McCarthy (R-Wis.).

“This is ridiculous,” Brit Hume tweeted Sunday.

Hume was responding to a tweet from Trump comparing Mueller’s probe to McCarthy’s search for communists in the U.S. government in the 1950s.

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“Study the late Joseph McCarthy, because we are now in period with Mueller and his gang that make Joseph McCarthy look like a baby!” the president tweeted. "Rigged Witch Hunt!"

Trump often labels Mueller’s probe into Russian interference in the 2016 election a “witch hunt” and has called for it to end.

The president’s Sunday morning string of tweets also targeted the “failing” New York Times for an article that implied White House counsel Don McGahn was cooperating with the probe.

“The failing @nytimes wrote a Fake piece today implying that because White House Councel Don McGahn was giving hours of testimony to the Special Councel, he must be a John Dean type 'RAT.' But I allowed him and all others to testify - I didn’t have to. I have nothing to hide,” Trump tweeted.

"And have demanded transparency so that this Rigged and Disgusting Witch Hunt can come to a close. So many lives have been ruined over nothing - McCarthyism at its WORST! Yet Mueller & his gang of Dems refuse to look at the real crimes on the other side - Media is even worse!"

The failing @nytimes wrote a Fake piece today implying that because White House Councel Don McGahn was giving hours of testimony to the Special Councel, he must be a John Dean type “RAT.” But I allowed him and all others to testify - I didn’t have to. I have nothing to hide...... — Donald J. Trump (@realDonaldTrump) August 19, 2018