Veteran state Sen. Don Balfour lost re-election in the primary on Tuesday, May 20, 2014.

Balfour is the longest-serving Senate Republican and was acquitted last year of charges he improperly billed the state for travel expenses.

Former Gwinnett County Commissioner Mike Beaudreau and former Lawrenceville City Councilman P.K. Martin both finished ahead of Balfour, setting up a runoff between the two candidates on July 22, 2014.