The Obama and Romney campaigns, as well as affiliated groups, have asked their supporters to provide access to their profiles on Facebook and other social networks to chart connections to low-propensity voters in battleground states like Colorado, North Carolina and Ohio.
When one union volunteer in Ohio recently visited the A.F.L.-C.I.O.’s election Web site, for instance, she was asked to log on with her Facebook profile. Computers quickly crawled through her list of friends, compared it to voter data files and suggested a work colleague to contact in Columbus. She had never spoken to the suggested person about politics, and he told her that he did not usually vote because he did not see the point.
“We talked about how if you don’t vote, you’re letting other people make choices for you,” said the union volunteer, Nicole Rigano, a grocery store employee. “He said he had never thought about it like that, and he’s going to vote this year.