I remember the eve of the 2008 election. I was in the car, listening to Hannity. He got a surprise call from McCain, who thanked him for his help, and McCain sounded completely despondent. Hannity seemed shaken afterward. My husband was listening at work, and when I got home, he called me: “Did you hear McCain? That was good-bye.”
McCain did 4 years as a POW in Viet Nam. I highly doubt he was “shaken”.