Mich. Comp. Laws § 168.55: Candidate for office of governor or lieutenant governor; write-in.

Sec. 55.

If, for any reason, there is no candidate of a political party for the office of governor or lieutenant governor, a blank space shall be provided on each of the official primary ballots that affords every elector of the political party an opportunity to vote for a candidate for those offices by writing in the name of his or her selection.