A commenter questioned why I had this month's poll topic focused on John McCain. I answered in the comments field but wanted to also draw it out into the main blog in case other people were wondering, as well.
McCain is 72 now and would be 76 at the end of his term. The average life expectancy for an American, according to the National Center for Health Statistics, is 77.8 years. And McCain, should he win, would be the oldest person ever inaugurated president.