Fifteen percent of registered voters have already cast their ballots, according to a poll released Tuesday.
Neither candidate has an edge among early voters nationally, the Gallup survey found. One-third of Barack Obama backers plan to vote early, as do 34 percent of Romney supporters. So far, 15 percent of Obama voters have shown up at the polls, compared to 17 percent of Romney voters.
Source: Politico. Read full article. (link)