The Democratic candidates (save Mike Gravel, whom MSNBC chose to bar for failing to meet certain polling requirements) took the stage Tuesday night at Drexel University in Philadelphia. It was the first debate since Senators Obama and Edwards had vowed to take more aggressive aim at their frontrunning opponent, Senator Hillary Clinton. Did she survive the onslaught? And what does everyone think about Iran? Find out all the answers in today's Debate Highlight Reel episode of TPMtv ...

Watch this episode on YouTube.