Some YouTube videos to peruse.
The Clinton campaign provides footage of Obama and Edwards promising to be clean campaigners.
Bill Richardson's latest Iowa ad: "When I Began"
And finally, the two ads comprising Ron Paul's $1.1M New Hampshire ad buy.
We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.
Marc Ambinder is a contributing editor at The Atlantic. He is also a senior contributor at Defense One, a contributing editor at GQ, and a regular contributor at The Week.