How Do Proof-of-Citizenship Laws Block Legitimate Voters?

Source: Stuart Naifeh, Dēmos, August 25, 2014

From the summary:
… These states insist that requiring such evidence is necessary to ensure that non-citizens do not fraudulently register to vote—something that occurs extremely rarely, if at all. In fact, these laws prevent numerous eligible voters from registering simply because they do not have an acceptable document showing their U.S. citizenship. At the same time, documentary proof-of-citizenship requirements do no more to prevent voter registration fraud by non-citizens than the threat of criminal prosecution and deportation has done ever since states began registering voters. Preventing legitimate voters from participating in our democracy is an unacceptable price to pay for stopping at most a tiny number of fraudulent voter registrations…. States that require documentary proof-of-citizenship vary in what kinds of documents they will accept. Unfortunately, although the laws on first read appear to permit a wide variety of documents to be accepted, the reality is that many of the acceptable documents either don’t exist or are not obtainable for many individuals. Both Kansas and Arizona, for example, claim to accept a driver’s license or identification card issued by another state if the document indicates on its face whether the applicant is a citizen. Since no state—including Kansas and Arizona themselves—issues licenses or identification cards containing such a citizenship indicator, these states effectively permit only their own licenses to be used. Similar problems limit voters’ ability to use the other acceptable documents. …