Asked about Trump's comments during a Fox News interview, which aired on Thursday night, McConnell aimed his criticism at Democrats, saying "they just can't let it go."

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"I said weeks ago 'case closed'. We got the Mueller report, the only objective evaluation that will be conducted. … The case is closed; why don't we move on and solve the border crisis and approve the president's USMCA, the new trade deal with Mexico and Canada? We have work to do," McConnell said.

"He gets picked at every day over every aspect of it. But the fundamental point is they're trying to keep the 2016 election alive and the investigation alive, when the American people have heard enough," he said, returning his focus to congressional Democrats.

McConnell, who is running for reelection in a red state next year, added that he "would ask the Democrats in the House this: Is there anything you're willing to do other than harass the president for the next two years?"

McConnell's defense of Trump comes after the president sparked widespread backlash , including from members of his own party, when he told ABC News that he was open to accepting information from a foreign government.

“I think you might want to listen. There’s nothing wrong with listening,” Trump said earlier this week. “It’s not an interference. They have information. I think I’d take it. If I thought there was something wrong, I’d go, maybe, to the FBI.”