UPDATE - 5/14: The Obama campaign has announced a "major national endorsement" for a rally tonight at 7pm in Michigan, and the rumor mill is swirling that it is none other than Sen. John Edwards. Time's Mark Halperin is teasing as much at his Web site, with a photo of Edwards and the text, "Ready to choose? Ready to hope?"
Edwards has certainly dropped some hints in recent days. He's chided Hillary Clinton over her comments about race, said...
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