LANSING (AP) — An abortion-rights group on Thursday asked the Michigan Supreme Court to approve a November ballot question on whether a right to abortion should be enshrined in the state constitution.

Reproductive Freedom for All filed its request with the high court after the state canvassing board rejected the ballot question on Wednesday. That body deadlocked 2-2 along partisan lines, with a pair of Republican commissioners citing what they called spacing errors in the petitions calling for the ballot question.

Abortion-rights supporters say it’s important for state residents to be able to weigh in on the abortion question, especially because of a 1931 law that would ban all abortions except to save the life of the mother that abortion opponents had hoped would be triggered by the U.S. Supreme Court’s reversal of Roe v. Wade in June.

The law has been blocked by months of court battles.

In the filing, the group asked the court to order the Board of State Canvassers to certify the question for the November ballot, and to do so by Wednesday.

That would give board members time to certify the initiative before the board’s meeting on Sept. 9, which also is the deadline set by state law for the board to certify the ballot to the Secretary of State.

RFFA submitted more than 750,000 signatures, attorneys for the group wrote, making it the largest number submitted for a ballot initiative in state history. State law required a minimum of about 425,000 valid signatures, and state officials determined last week that the petition contained nearly 600,000 valid signatures.

RFFA said the volume of signatories demonstrated “widespread grassroots support.”

“This Court should safeguard the right of the People to exercise their political power and protect it from strained interpretations of law that stand to disenfranchise hundreds of thousands of voters,” attorneys argued.

Abortion-rights supporters have criticized the Republican members of the state board — a panel once seen as handling largely routine, administrative matters — as bowing to political pressure to try to stop the measure from appearing on the ballot.

Democrats believe the issue has helped the party gain ground on Republicans this election cycle since the U.S. Supreme Court eliminated constitutional protections for abortion.

In conservative Kansas, for example, voters overwhelmingly defeated a measure that would have allowed the Republican-controlled Legislature to tighten restrictions or ban the procedure outright.

Michigan, a swing state that also is a presidential battleground, has several high-stakes races on the ballot in November, including contests for governor, secretary of state and attorney general.