Candidates mingled with supporters Saturday as the Bulloch County Republican Party opened its 2012 campaign headquarters. Yard signs printed with candidates’ names waited in stacks along a wall, while in a side room volunteers for GOP congressional nominee Lee Anderson cued up a phone bank to automatically dial numbers in the 12th District. During the afternoon open house in the formerly vacant storefront property, at 600 S. Zetterower Ave., three candidates for contested seats — one each at the federal, state and county level — greeted potential voters who were offered hot dogs, hamburgers and a choice of soft drinks, beer or wine.