BOISE, Idaho (AP) — GOP candidate Sherri Ybarra of Mountain Home held a slight lead against her three opponents in early returns Tuesday in Idaho's primary for superintendent of public instruction. Randy Jensen of American Falls was in second place, with Andy Grover of Melba in third, followed by John Eynon of Cottonwood. All four of the candidates came with educator experience but no political background. Democratic challenger Jana Jones ran unopposed in the primary. Jones barely lost to incumbent Tom Luna in 2006 and is expected to be a strong challenger in November's general election. Luna opted not to run for a third term. The Gem State is one of 13 states where the superintendent of public instruction is an elected office.