Former House Speaker Newt Gingrich said that President Trump has "every right" to be "deeply" frustrated that Attorney General Jeff Sessions has recused himself from the Russia probe.

Trump on Wednesday tweeted that the charges against his former campaign chairman, Paul Manafort, have nothing to do with alleged collusion with the Kremlin.

Manafort faces charges of conspiracy to commit money laundering, making false statements and working as an unregistered agent of the government of Ukraine. 

Some have suggested that the prosecution of Manafort is going forward because Special Counsel Robert Mueller wants him to provide evidence against the president. 

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"This is exactly what independent counsels do," Gingrich said on "America's Newsroom." "They can't solve the case they were hired for, so they invent a case."

Gingrich, a Fox News contributor, added that he believes Manafort has a "good chance" to prevail at trial and Mueller will "look like a fool" if that happens. 

"The whole country is gonna shrug off everything else that Mueller does," he argued. 

Trump also tweeted Wednesday that Sessions needs to stop the "Rigged Witch Hunt" against him.

Gingrich said Trump should "endure" the investigation instead of firing Sessions, but that Sessions has the "absolute authority" to fire Mueller's team.

"This is a disgraceful, one-sided witch hunt by a bunch of left-wing Democrats," he said, adding that the fallout of senior intelligence officials shows that "the sickness" in the Justice Department and FBI is "very real."

Gingrich said he believed Mueller to be a "very respectable guy" but his opinion has changed after seeing who Mueller hired for his team and the subsequent revelations about the conduct of former FBI Director James Comey and top agent Peter Strzok. 

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