Arizona voters will decide this November whether to add abortion rights into their state constitution, a prospect that could turbocharge voter turnout in a critical battleground state in the 2024 election.

Late Monday, the Arizona secretary of state’s office announced that it had validated an estimated 577,971 signatures in support of a ballot measure, the Arizona For Abortion Access Act, to establish a constitutional right to abortion in the state.

On X, the office called the measure “the largest petition effort in Arizona history”. The measure will be listed on the ballot as Proposition 139.