Early voting booths are set up at the Minnehaha County administration building in Sioux Falls ahead of the June 2026 South Dakota primary election. (Photo by Makenzie Huber/South Dakota Searchlight)A campaign committee has launched a referendum effort to repeal a new law that would use money from a scheduled statewide sales tax increase to lower property taxes for homeowners. Lawmakers reduced the sales tax rate from 4.5% to 4.2% in 2023, with t…