Sen. Lindsey Graham (R-S.C.) asked President Trump during an appearance on Fox News not to fire special counsel Robert Mueller, who is currently investigating Russian meddling in the 2016 election.

“Mr. President, if you’re watching, I think you’re gonna be fine unless you screw this up,” Graham said on Fox News. “Let the process play out. I don’t believe you colluded with the Russians, but Mueller will soon tell us. The Cohen situation, I am convinced, has got nothing to do with Russia.”

Graham’s comments come after reports that the president reportedly wanted to fire Mueller in December and has recently been mulling firing Deputy Attorney General Rod Rosenstein.

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The senator said he believes that the recent raid on Trump’s personal lawyer Michael Cohen — which was approved by Rosenstein —  was unrelated to the Russia investigation.

“If Mueller was trying to squeeze Cohen, Mueller would have done it. This is something unconnected to Russia, I am 100 percent convinced of that, and we’ll see what Mueller does. Let him do his job,” Graham told Fox News’s Martha MacCallum.

Graham also said that he does not understand why there isn’t a special counsel outside of the Justice Department looking into the “politically motivated dossier paid for by the Democratic Party.”

Graham’s comments are the latest in a series of warnings he has given the president against firing the special prosecutor.