FiveThirtyEight.com: On the Road: Marietta, Ohio

"When local field organizer Christian Lund took the stage just prior to Joe Biden's appearance on Tuesday night in Marietta, he asked those in the attendant crowd of about 4,000 to look at the sheets in their hands. Each sheet held four names, and each name had a phone number and a bar code for later data scanning. Lund asked the people in the crowd to make four phone calls to this targeted group, and then he demonstrated. Lund got voicemail. Over the microphone, he left a message informing his phonee about where and when to early vote, as well as where and when the Obama volunteer office was located in town and what it's hours were. After he was finished, it was the crowd's turn. 'We even got extra cell tower juice just for tonight' Lund told the crowd, so go ahead and make four quick calls on Barack Obama's behalf. They did."

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