 and everybody who mails in their ballot to include either the last four of their driver's license or the last four of their Social Security number. Opponents trotted out the same arguments they've been nursing for years, that black people don't have driver's licenses, that it's harder for them to find the polling place, and that the requirement to show a picture ID before voting is wildly unpopular. Gibbs says the data disagree. There was a Fox News poll that was done early June.