Three states are holding primaries Tuesday, and voters might understandably be confused over what kind of identification they need to show at the polls.
In Indiana, it has to be a government-issued photo ID. In Ohio, you can get by with a utility bill. In North Carolina, you won't need a photo ID until 2016. But that law, along with ID laws in many other states, faces an uncertain future.
"We have Florida, Georgia, Indiana," says Wendy Underhill, of the National Conference of State Legislatures.