As recently featured on Slate.com’s weekly political wrapup podcast, livingroomcandidate.org features presidential campaign ads from the last 50 years, including one from 1960 with a catchy tune about John Kennedy (”A man who’s old enough to know but not too young to do”) and one from 1988, just after George H.W. Bush chose Dan Quayle as his running mate, reminding voters that one in five vice presidents in history have become president.