FILE - In this Oct. 20, 2016 file photo ,voters line up during early voting at Chavis Community Center in Raleigh, N.C. More than a dozen states have enacted tougher requirements for registering and voting since the U.S. Supreme Court overturned a key provision of the Voting Rights Act three years ago. That has led to confusion and claims that certain groups, mostly minorities who tend to vote with Democrats, are being disenfranchised. (AP Photo/Gerry Broome, File)

Confusion, obstacles raise voting concerns in some states

Indiana State Police have said they are investigating some voter registration applications submitted by Patriot Majority USA, a Washington, D.C.-based voter mobilization group with ties to the Democratic Party.