Attorneys are wrapping up testimony in the federal trial of South Carolina's voter identification law.
The law requires voters to show photo identification when they vote.
The Obama administration says the law violates Voting Rights Act protections of minority voting rights and has kept it from going into effect. That prompted South Carolina to sue.
"States like Indiana and Pennsylvania that have done this, they have not historically had discrimination. So they don't have to be cleared by the justice department," says Francis Marion University professor David White, Ph.D.
South Carolina and Texas are actually two of nine states that have to seek approval of the law because of the states' history of discrimination.
On Thursday, a three-judge panel sought more information on how the state would carry out a provision in the law allowing people to vote without photo ID if they submit notarized affidavits saying they have a "reasonable impediment" to getting the required identification.
Testimony wraps up Friday, and closing arguments are set for Sept. 24.
The AP contributed to this report.