I don’t think McCain is senile. I say that because the sense of humor is the first thing to go when senility hits and McCain has a great wit. He was very funny imitating Barbara Streisand and was funny on SNL the other nite. Maybe you did not really meant senile in the clincal sense.
He seems to have a ton of energy and showed during the debates that he is very clever and is good at finding weaknesses in his oppenent.
72 is not that old anymore. Maybe that’s because I am already 54 LOL.
Plus, his daughter claims he likes 9 inch nails (g).