Last week, former Democratic congressman Artur Davis (Ala.) grabbed headlines when, just four years after introducing then-candidate Barack Obama at the Democratic National Convention, he took the stage at the GOP convention to denounce Obama and seek forgiveness.

Today, Democrats had their revenge, as former GOP senator and current independent Rhode Island Gov. Lincoln Chafee spoke at the DNC and paid tribute to the virtues of political moderation, while attacking the Republican ticket. (Former Florida governor Charlie Crist, another former Republican, will speak Thursday.)

"As a former Republican, I represent a group of Americans who all too often have no one to speak for them," Chafee said in a halting cadence. Chafee said there was "nothing conservative about the Republican Party" which had been "hijacked" by the far right. He said that it was the GOP's lack of "fiscal responsibility" that forced him to leave the party following his 2006 loss to Democrat Sheldon Whitehouse.