On Thursday night’s episode of The Late Show with Stephen Colbert, Meghan McCain gave a very encouraging update about her dad, Sen. John McCain.

“He had a sort of rough time at Christmas and he’s made this crazy amazing recovery which I guess I shouldn’t be surprised at,” she said. “He is so resilient in so many different ways. He’s a tough bastard.”

Sen. McCain, who was diagnosed with an aggressive form of brain cancer earlier in 2017, was hospitalized in December for treatment of side effects from the cancer therapy. McCain has been away from the Capitol since as he recuperates at home in Sedona, Ariz.

On when the senior senator from Arizona will be back in Washington, D.C., McCain didn’t give a timeframe, but said she “hope he comes back to Washington very soon because I would like to see him go up against Trump a little more.”