Sen.(R-S.C.) said Thursday that Attorney Generalshould step back from any criminal prosecution that stems out of a probe into contacts between President Trump officials and Moscow.

"If — if — there is ever enough evidence to suggest prosecution or criminal prosecution of anybody based on the contact, then somebody other than Sen. Sessions, in my judgement ... should make that decision because of his contacts with the campaign," Graham told reporters.

He added: "If there's credibility to the allegations of inappropriate contacts between the [Russian] government and the campaign, in my view, for the good of the integrity of the system, somebody should pursue that — not Jeff Sessions."

Graham's comments come after The Washington Post reported that Sessions spoke to Russian Ambassador Sergey Kislyak during the presidential campaign, then denied any meetings with Russian officials under oath during his confirmation hearing.

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A growing number of Democrats are calling on Sessions to resign.

Asked about the demand, Graham said Democrats are "crazy."

"They've just absolutely lost their minds when it comes to all things Trump," he said.

The former GOP Alabama senator reportedly spoke with Kislyak during a July Heritage Foundation event at the Republican National Convention attended by about 50 ambassadors. Sessions also spoke with Kislyak via phone in September, according to a spokeswoman for the attorney general. The conversation took place during a time when U.S. intelligence officials assert Russia was interfering in the 2016 presidential race through a hacking and influence campaign intended to help sway the election for Trump.

Graham argued on Thursday that Sessions's comments to the committee were "all about campaign contacts" but added that he does believe Sessions should publicly clarify his conversations with the Russian ambassador.

"If he met the Russian ambassador as a senator, then he needs to tell us what they talked about," he said.