Five states – Arizona, Michigan, Missouri, Kansas, and Washington – hold primary elections on August’s biggest single election day. Summary Five states – Arizona, Michigan, Missouri, Kansas, and Washington – hold primary elections on August’s biggest single election day. Multi-way Republican primaries for U.S. Senate in Missouri and Arizona reach their conclusion on Tuesday. Businessmen Blake Masters and Jim Lamon and state Attorney General Mark Brnovich are competing for the right to take on Democratic Sen. Mark Kelly in Arizona. …