The following article by Liz Kennedy and Danielle Root was posted on the Center for American Progress website July 18, 2017:
Introduction and summary
The ability to cast a ballot freely is key to having our voices heard and exercising control over our government. Without the right to vote, people do not have a say in the laws they must follow, and if the basic precept of a liberal democracy—the consent of the governed—is broken, the descent into authoritarianism begins. But to cast a ballot, every state except North Dakota requires people to register to vote.1
Many states have made great advances in lowering barriers to voter registration, providing a gateway to voter participation through tools such as automatic voter registration, same-day registration, and online voter registration.2 Unfortunately, many states are using voter registration tricks that manipulate the voter rolls and keep eligible
Americans from having their voices heard. This report looks at two of the worst practices used to block eligible voters from participation: documentary proof of citizenship requirements, where people must show evidence of citizenship in order to become registered to vote, and illegal voter purges. Like other forms of voter suppression, both of these practices close off the democratic process to wide swaths of eligible Americans.