This, of course, was the intent.

RICHARD WOLF, USA TODAY - Voter identification requirements designed to combat fraud can reduce turnout, particularly among minorities, a new study shows. A study by the Eagleton Institute of Politics at Rutgers University shows turnout in 2004 was about 4% lower in states that required voters to sign their name or produce documentation. Hispanic turnout was 10% lower; the difference was about 6% for blacks and Asian-Americans.

http://rssfeeds.usatoday.com/~r/UsatodaycomNation-TopStories/~3/93148891/2007-02-19-voter-id-study_x.htm