"We're sending this mailing to you, your friends, your neighbors, your colleagues at work and your community members to publicize who does and does not vote." The letter let Adams know that the senders intended to mail an updated chart after the Nov. 4 election. Increasingly, political groups across the country are utilizing publicly available voter lists and other databases to send mailings that use what researchers call "social pressure" to get people to vote. The most forceful threaten to expose an individual's voting record, or lack thereof, to peers. ...was sent by a political action committee called the Opportunity...