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Potomac Primary Preview

Your Daily Politics Video Blog: The Potomac Primary (Maryland, DC and Virginia) is today. And we'll start reporting live results here at 7 PM Eastern. If you want to know what to expect and what the surprises might be, we've got it all in today's Potomac Primary Preview episode of TPMtv.

Tags : video, politics, blog, McCain, primary, Huckabee, election08, virginia, washington, potomac, maryland, DC