[torchthemummy]

...but the effort has failed to quell questions about his odds of surviving an eight-year tenure in the White House.

Right off the top the premise is wrong. McCain needs to win the first term before he can even think of a second. There is no statute (or moral obligation) of any sort that if one runs for the Presidency that one is obligated to be healthy enough to serve for two terms. This is really beyond belief.

[hotshu]

I think he has already said he wants only one term.