A Michigan state appeals court has upheld a lower ruling that struck down the state's January 15 primary on technical grounds, potentially canceling the rogue primary. The office of Michigan Attorney General Mike Cox said no decision has been made on whether to appeal to the state Supreme Court.

If the law remains invalidated, the state Republicans will select their delegates at the Jan. 25-26 state party convention, while Democrats are tentatively planning to hold a February 9 caucus.