CONCORD, N.H. – An unflinching John McCain was told Tuesday by New Hampshire high school students that he might be too old to be president and too conservative to be respected. McCain, the Arizona senator whose presidential bid has stumbled through the summer, countered the Concord High School students with humor. “Thanks for the question, you little jerk,” McCain joked back to one student who asked the 71-year-old about his age. “You’re drafted.” McCain’s two-day trip to New Hampshire launches his fall campaign for the GOP nomination. During a morning visit with students, he explained why he is not shrinking from his support for a temporary increase of troops in Iraq and why students should pay attention. The audience groaned; McCain slid into a joke. “I think it was one of my sons that alleged I’m getting to the point I hide my own Easter eggs,” McCain said to laughter. “When you saw my 95-year-old mother (on a video introduction), you saw the kind of genes I have.” He said he’s a hard campaigner and that his age won’t be an issue. Another student pushed him on gay rights; McCain repeated his pledge to oppose discrimination but to support traditional marriage. “I came here looking to see a good leader,” 16-year-old William Sleaster told McCain, earning boos from his classmates. “I don’t.” McCain, a veteran of such candid exchanges in New Hampshire, smoothly pushed forward and told the crowd not to disrespect its peer. “I understand. I thank you,” McCain said. “That’s what America is all about.” At a later town hall-style event in a Bow fire station, McCain told voters that evenings like the one they were spending are the reason he still stands a chance. “Money doesn’t buy elections in New Hampshire, my friends. … Questions and comments and face to face with voters wins votes in New Hampshire,” he said.160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! “If this war continues much longer, there will be people in this audience who will serve in the military, who also may be going over there (to Iraq) or to Afghanistan,” McCain told them. He said they should watch the upcoming report on Iraq from Gen. David Petraeus. “It may be a seminal debate. It may be one of the most important debates in history and it may directly affect your lives,” he warned. “He’s going to say: Whether it was or was not in the beginning, if we lose Iraq, it will be part of this struggle against radical, Islamic extremism because al-Qaida will take over and the area will deteriorate into chaos and destruction.” But during a town hall-style meeting, students were more interested in pushing McCain on the environment, his support for gay rights and even his age. “If elected, you’d be older than Ronald Reagan, making you the oldest president. Do you ever worry you might die in office or get Alzheimer’s or some other disease that might affect your judgment?” one student asked.