"There's no comity with Harry Reid. I think he's an absolute a--hole," Coburn said at a gala for the New York Young Republican Club, as quoted by the Daily News.
Asked about the level of civility in the Senate, Coburn reportedly listed other Democratic senators that have "great relationships" with him, including Chuck Schumer (D-NY).
A request from TPM for comment was not immediately returned by Coburn's office.
This post has been updated.