Regardless of what you think of his politics, is John McCain too old for the Whitehouse? Most political talking-heads agree the question is a political liability for the candidate. Sarah Needleman had great insight on the topic earlier in May in the Wall Street Journal, and the subject is unlikely to go away anytime soon. Indeed, it will only increase as November draws near. She quotes an AARP survey we reported on earlier (actually much earlier, in 2004) that found 79 percent of boomers plan to work in some capacity during their retirement years. No real surprise here; boomers show little, if any, signs of slowing. But McCain’s not a boomer, and the country’s top job is hardly the equivalent of semi-retired boomers lending their accumulated career expertise to companies on a part-time basis.