Who needs voter ID—The United States

Research commissioned by the Pew Center on the States

•Approximately 24 million—one of every eight—voter registrations in the United States are no longer valid or are significantly inaccurate.
•More than 1.8 million deceased individuals are listed as voters.
•Approximately 2.75 million people have registrations in more than one state.
Voter ID can't cure all these problems, but sure couldn't hurt.

http://www.pewtrusts.org/our_work_report_detail.aspx?id=85899370677