The scrappy old duo of Truman and Barkley outworked and out-punched their younger, meeker Republican opponents across the country, toiling right up until Election Day, even as their opponents rested up. The results? Truman stayed in the White House and the Democrats kicked out the "do nothing" Congress. So maybe the VP choice isn't (always) just an afterthought, at least not when they're made of iron. 2016 election hopefuls take note.