BLUFFTON, S.C. (AP) — South Carolina's new voter ID law could pose problems for seniors who regularly vote Republican and live in affluent communities along the southern coast.An analysis by The Associated Press shows Beaufort County has the highest concentration of registered voters 65 and older without driver's licenses or a state ID. Voters will need one of those IDs or a U.S. passport or military ID to cast a ballot in person when the law takes effect.GOP leaders in the area say they are confident that the older Republicans have one of the four accepted IDs.The U.S. Justice Department is reviewing the law to see if it complies with the Voting Rights Act.