(The Center Square) — Groups are mounting a new challenge to South Carolina’s congressional districts, which they say are gerrymandered and “artificially entrenches the power of one political party and violates the fundamental constitutional rights of South Carolina voters.” The American Civil Liberties Union, the ACLU of South Carolina and Duffy & Young filed the lawsuit this week on behalf of the League of Women Voters of South Carolina. The suit, filed in the South Carolina Supreme Court, names Senate President Thomas Alexander, R-Walhalla; House Speaker Murrell Smith, R-Sumter; and Howard …