DES MOINES, Iowa (AP) – Republicans will choose a candidate for the 3rd Congressional District at a nominating convention June 21 in Creston. Iowa Republican Party Chairman Danny Carroll announced Wednesday that 513 delegates will gather at Creston High School to select a nominee.

The task is required because none of the six people who sought the GOP nomination topped the 35 percent threshold for votes required by state law. State Sen. Brad Zaun received the most votes but only 25 percent of all votes cast. The nominee will face Democrat Staci Appel, who was unopposed in the Democratic primary.

The 3rd District covers much of southwest Iowa, stretching from Des Moines to Council Bluffs.