LANSING, Mich. — Michigan’s attorney general asked the U.S. Supreme Court to quickly intervene in a voting case Friday so a new ban on straight-party voting can take effect for the November election.

The emergency request argues that a federal district judge and the 6th U.S. Circuit Court of Appeals wrongly blocked the law when “all Michigan has done is adopt an approach that 40 other states already follow.” The ban would prevent voters from supporting all candidates from one party with a single mark.

Republican Attorney General Bill Schuette said a response from the justices is needed by Thursday so election officials can start printing ballots.

Schuette filed the appeal a day after the 6th Circuit declined Michigan’s request for the full appeals court to quickly consider the case. A lower judge blocked the law in July, and a three-judge panel of the appeals court declined to halt that ruling in August.

The district court ruled that the GOP-sponsored law — which is opposed by Democrats — would create longer lines and disproportionately burden black voters who are more likely to use the straight-ticket option.

The Supreme Court weighed in this week on a voting rights case in North Carolina by refusing to reinstate the state’s voter identification requirement and keep just 10 days of early in-person voting. The court rejected a request by Republican Gov. Pat McCrory and other North Carolina officials to delay a lower court ruling that found the state law was tainted by racial discrimination.