Representative Paul Ryan's rise to the second-slot of the Republican presidential ticket has everyone in a frenzy. Democrats think the right-wing rock star will poison Romney's campaign, while the GOP applauds Mitt Romney's vice-presidential choice as a much needed dose of excitement—and a sign that the presidential running mates are deeply wedded to the right. But there's one thing everyone can agree upon: Paul Ryan is going to be an A-lister on the political stage for a long time, even if Romney loses. Here's a look back at vice-presidential candidates who never reached the hallowed halls of the White House.

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The Ghosts of Vice-Presidents Past