Gov. Andy Beshear (D-KY) sent another letter to Sen. Mitch McConnell (R-KY) on Monday night, demanding the senator provide evidence he is capable of serving or resign from his post.

McConnell and the Office of the Attending Physician provided a brief update on the senator’s health earlier Monday, explaining he was not yet cleared to leave rehabilitation therapy and return to Congress. The 84-year-old has been absent from the chamber since he was hospitalized in Washington, D.C., on June 14 after taking a fall.