Mich. Comp. Laws § 168.534
A general primary of all political parties except as provided in sections 532 and 685 must be held in every election precinct in this state on the Tuesday after the first Monday in August before every general November election, at which time the qualified and registered voters of each political party may vote for party candidates for the office of governor, United States Senator, Representative in Congress, state senator, representative in the legislature, county executive, prosecuting attorney, sheriff, county clerk, county treasurer, register of deeds, drain commissioner, public works commissioner, county road commissioner, county mine inspector, surveyor, and candidates for office in townships. A nomination for an office must be made only if the official is to be elected at the next succeeding general November election.
MCL 168.534