South Carolina has gone ahead with a lawsuit against the federal government for blocking a recent law requiring voters to show photo IDs at the polls. The U.S. Department of Justice declared in December the law violates the Voting Rights Act, citing data showing minority voters were about 20 percent more likely to lack acceptable photo ID required at polling places. It was the first such law overruled by the Justice Department in nearly two decades. On Tuesday, South Carolina filed suit, rejecting the government’s claim that the law will disenfranchise voters.