As it stands, McCain's age is a concern to quite a few people in terms of his ability to be an effective president. However, as he has a fair number of supporters, it is quite possible that most of us who question his old age could be making an incorrect assessment, so he may very well be effective in his first term. That said, if McCain were to become president, he would be 76 when his first-term ends. Whats the likelihood that he stays on for a second term?