In 2007, Democrats were delirious with rage about the Iraq war. Hillary Clinton, the "inevitable" presidential front-runner, had voted for the war and refused to apologize for it. Other leading candidates, including Joe Biden, John Edwards and Chris Dodd, voted for it too. This left a huge opening for a credible antiwar candidate. Barack Obama, inexperienced and underqualified, nonetheless jumped into the vacuum. The rest, as they say, is history.