Oh, the responses should be precious.
Well, at least our candidate made it to the General Election.
I'll regroup and reload if Romney loses. He'll only be 69 in 2016, younger than McCain or Reagan was. It's certainly possible.
Age wouldn't be the problem. If he loses once, the party will never nominate him again because everyone will remember him for losing. It's hard to imagine anyone pulling a Richard Nixon and running again after a failed general election presidential bid in our modern news cycle era.