Sen. Lindsey Graham, R-S.C., doubts the factuality of a Washington Post report published Friday that stated White House senior adviser Jared Kushner had tried to set up a secure, secret line of communication between President Trump's campaign and the Russian government.

"You've got the ambassador to Russia reporting back to Moscow on an open channel, 'Hey, Jared Kushner is going to move into the embassy.' I don't trust this story as far as I can throw it," Graham told CNN "State of the Union" guest host Dana Bash.

"It makes no sense that the Russian ambassador would report back to Moscow on a channel that he most likely knows we're monitoring. The whole story line is suspicious," added Graham.

The South Carolina Republican has been critical of both Trump's behavior and policies over the past four months, but said he is "not going to jump to the conclusion that Mr. McMullin jumped to."

Graham was referring to former independent presidential candidate Evan McMullin tweeted over the weekend the report points to "treasonous activity, whether borne of malice or naivete, or both."