"I doubt it. There's zero chance the president ... would be removed from office, and I'm hoping we'll have no defections at all," McConnell said.

Republicans hold 53 seats in the Senate. Because 67 votes would be needed to convict Trump and remove him from office, it's all but guaranteed that the president will ultimately be acquitted.

But there has been lingering speculation that at least one GOP senator could vote to convict Trump. Sen.(D-Conn.) grabbed headlines last week when he told MSNBC's "Morning Joe" that he has talked to GOP senators who considering supporting impeachment but stressed "it’s a small list on one hand."