Senator Rand Paul (R-Ky.) reacted to criticisms of President Trump's summit with Russian President Vladimir Putin.

Trump was slammed widely for saying he took Putin's word that the Kremlin did not interfere in the 2016 election, despite opposing conclusions from Director of National Intelligence Daniel Coats.

The president backtracked on Tuesday, saying he accepted the U.S. intelligence community's conclusions on Russia's election-meddling.

"I have full faith in our intelligence agencies," Paul said.

He said Trump sees the special counsel investigation into the election as a federal accusation that he colluded with Russia.

Paul said there are two distinct parts of the Mueller probe that get "conflated" by many.

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He said the probe is looking into both whether Trump associates colluded with Russia and whether Russia hacked into Hillary Clinton campaign emails and leaked them to the public.

"His instinct is to push back," Paul said, adding that he does not believe Trump colluded with Russia.

Paul also called former CIA Director John Brennan "completely unhinged" for accusing Trump of "treason" during the Putin summit.

Paul said it is frightening that Brennan exposed himself as a "partisan" shortly after working as the head of the most powerful intelligence agency on the planet.

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