On November 13, the Michigan Attorney General asked the State Court of Appeals to hold a hearing no later than November 16, on whether it is unconstitutional for the state to give a list of presidential primary participants to each of the two major parties, and to otherwise withhold the list. The case is called Grebner v State. The lower court had ruled that policy unconstitutional.

Also on November 13, the Michigan Republican Party intervened in the case, on the side of the state. The state party chair affirmed that the party still prefers to choose its delegates to the national convention by primary.