PHOENIX — John McCain's underdog opponent in next week's primary election is going there: Should he win, Kelli Ward told POLITICO flatly on Wednesday, the soon-to-be 80-year-old senator may not live to finish out his six-year term.“I’m a doctor. The life expectancy of the American male is not 86. It’s less,” Ward said in an interview here.Age tends to be a delicate issue in campaigns, alluded to by rivals but rarely attacked head on.