COLUMBIA, S.C. — Gov. Henry McMaster vows to fight against labor unions, curb access to illegal guns and improve the efficacy of health care agencies South Carolina. McMaster launched an onslaught against labor unions in his seventh State of the State address Wednesday, calling out an effort by the International Longshoremen’s Association to urge the Port of Charleston to convert traditional state jobs to union labor. “One thing we do not need is more labor unions,” McMaster said. “We have gotten where we are without them, and we do not need them now. We are a right to work state. We have the …