It was 2012, and an overconfident President Barack Obama had just bombed his first head-to-head against GOP nominee Mitt Romney. A wave of nervousness and doubt crested over his reelection bid after his sluggish debate performance, raising the stakes for Vice President Joe Biden in his own debate a week later against Wisconsin Congressman Paul Ryan. Biden rose to the occasion. He was authoritative and aggressive in all the ways Obama was not. He frequently interrupted to correct the wonky GOP star more than 25 years his junior, and seemed to hit just the right notes with his folksy style.