Former Rep. Joe Walsh (R-Ill.) said Friday that Republicans have 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 “blessing” to go after 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, even after Trump said he wasn’t worried about Mueller’s investigation.

In an appearance on CNN, Walsh criticized GOP lawmakers who have claimed that Mueller’s probe into ties between the Trump campaign and Russia is biased against Trump.

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“I think it is disgusting and offensive that my former colleagues and Fox News and everybody is maligning Robert Mueller, but they’re not doing that, Ana, if the president didn’t want them to,” Walsh said to host Ana Cabrera.

“So it's perfectly easy for Trump to come out last night and say ‘you know what, Mueller will be fair.’ These Republicans, they have his blessing Ana, to go after Mueller, and I think that’s a horrible thing.”

Republicans have scrutinized the probe after it was revealed that Mueller had removed an FBI agent from his team for sending anti-Trump text messages.

Trump, on Thursday, told The New York Times that he wasn’t concerned about Mueller’s probe.

“There’s been no collusion. But I think he’s going to be fair,” Trump said about Mueller.

The president has repeatedly called Mueller’s investigation a “witch hunt."

Walsh has publicly criticized Trump for his attacks on the FBI in recent weeks, warning Trump last week the attacks are “gonna bite you in the ass.”