(AP) -- The League of Women Voters and the NAACP have become the latest groups allowed to take part in a legal challenge over South Carolina's new voter identification law.
A federal judicial panel on Wednesday allowed the groups to intervene in the case reviewing the measure that requires voters to present government-issued photo IDs.
The Justice Department blocked the law in December, saying it could keep tens of thousands minorities from casting their ballots.
Officials also said the law failed to meet requirements of the 1965 Voting Rights Act, which requires the Justice Department to approve changes to South Carolina's election laws because of the state's past failure to protect blacks' voting rights.
State Attorney General Alan Wilson is suing U.S. Attorney General Eric Holder, arguing the law is not discriminatory.
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