The point is...to stop those almost non-existent cases of voter fraud...you'd make it so that millions of Americans will have problems voting. This is why those laws are being passed...
Citizens with comparatively low incomes are less likely to possess documentation proving their citizenship. Citizens earning less than $25,000 per year are more than twice as likely to lack ready documentation of their citizenship as those earning more than $25,000.4 Indeed, the survey indicates that at least 12 percent of voting-age American citizens earning less than $25,000 per year do not have a readily available U.S. passport, naturalization document, or birth certificate
Elderly citizens are less likely to possess government-issued photo identification. Survey results indicate that seniors disproportionately lack photo identification. Eighteen percent of American citizens age 65 and above do not have current government-issued photo ID.9 Using 2005 census estimates, this amounts to more than 6 million senior citizens.
Minority citizens are less likely to possess government-issued photo identification. According to the survey, African-American citizens also disproportionately lack photo identification. Twenty-five percent of African-American voting-age citizens have no current government-issued photo ID, compared to eight percent of white voting-age citizens.10 Using 2000 census figures, this amounts to more than 5.5 million adult African-American citizens without photo identification. Our survey also indicated that sixteen percent of Hispanic voting-age citizens have no current government-issued photo ID, but due to a low sample size, the results did not achieve statistical significance
http://www.brennancenter.org/page/-/d/download_file_39242.pdf
