
Michigan Attorney General Bill Schuette is filing an emergency request with the U.S. Supreme Court asking it intervene and overturn a lower court ruling that allows straight-party voting in the state next month.
He says the 6th U.S Circuit Court of Appeals has wrongly blocked the ban.
The ban would prevent voters from supporting all candidates from one party with a single mark.
Opponents say the practice is a tool of party politics because most who vote "straight ticket" are Democrats.