COLUMBIA, S.C. (AP) - Bob Livingston has defeated his GOP primary challenger in his bid to be re-elected South Carolina's top military officer.

Early returns in Tuesday's primary show Livingston with 77 percent of the vote over 45-year-old James Breazeale. Livingston has no opposition in November.

The adjutant general oversees the state's 11,000-member Army and Air National Guard, State Guard and the state's Emergency Management Division.

Livingston, 57, was elected in 2010 to a four-year term with no opposition. He has served 35 years in the Guard.

South Carolina is the only state in the nation where voters choose their top military officer in a general election. However, voters will decide in November whether the governor may appoint the adjutant general beginning in January 2019.