Quoting the study this story is based on:
A survey of registered voters in Dane and Milwaukee Counties who did not vote in the 2016 presidential election found that 11.2% of eligible nonvoting registrants were deterred by the Wisconsin’s voter ID law. This corresponds to 16,801 people in the two counties deterred from voting, and could be as high as 23,252 based on the confidence interval around the 11.2% estimate, which is between 7.8% and 15.5%. The survey further found that 6% of nonvoters were prevented from voting because they lacked ID or cited ID as the main reason they did not vote, which corresponds to 9,001 people, and could be as high as 14,101 based on the confidence interval of between 3.5% and 9.4%. Roughly 80% of registrants who were deterred from voting by the ID law, and 77% of those prevented from voting, cast ballots in the 2012 election.
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8.3% of white registrants were deterred, compared to 27.5% of African Americans.
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“The main conclusion of the study is that thousands, and perhaps tens of thousands, of oth- erwise eligible people were deterred from voting by the ID law,” said Mayer. “The 11.2% figure is actually a lower bound since it does not include people who don’t even register because they lack an ID."