Campaign Ground Game

  Bryan Munks, 19, of Arlington, Va., left, and Priscilla Houk, 17, of Fairfax, Va., make calls for the Romney campaign while wearing quick response code stickers, known as QR codes, in Fairfax, Va., on Tuesday, June 19, 2012. The presidential ground game has gone high tech, marrying old-school organizing work with innovative digital tools. The T-shirts that Romney campaign volunteers wear in Virginia feature a digital code that voters can zap with their smart phones to learn more about the Republican presidential hopeful, which gives Romney field organizers valuable information on how to reach them in the future. (AP Photo/Jacquelyn Martin)
Bryan Munks, 19, of Arlington, Va., left, and Priscilla Houk, 17, of Fairfax, Va., make calls for the Romney campaign while wearing quick response code stickers, known as QR codes, in Fairfax, Va., on Tuesday, June 19, 2012. The presidential ground game has gone high tech, marrying old-school organizing work with innovative digital tools. The T-shirts that Romney campaign volunteers wear in Virginia feature a digital code that voters can zap with their smart phones to learn more about the Republican presidential hopeful, which gives Romney field organizers valuable information on how to reach them in the future. (AP Photo/Jacquelyn Martin)

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