North Carolina Republican lawmakers voted to override the Democratic governor’s vetoes on two election bills on Tuesday, giving themselves new power over election administration and shortening a key voting deadline ahead of the 2024 election.

North Carolina Gov. Roy Cooper vetoed the bills earlier this year, saying in a statement that they make it harder to cast ballots, but Republicans have a supermajority in the legislature and voted to override his vetoes.

The bills promise to affect the swing state’s presidential election next year, though litigation is expected and could delay or block the implementation of challenged provisions.

In interviews earlier this year, advocates said they were most concerned about Senate Bill 749, which will rework the composition of state and local election boards, the five-person bodies that oversee democratic operations and certify election results.

County boards register voters, operate polling sites, and count ballots, while the state board appoints individuals to and oversees those local boards. Currently, all election boards in the state are controlled by the governor’s party, with nominations made by state parties and appointments made by the governor.

The legislation removes the governor from the process completely, creating state and local boards that are evenly divided between the two parties and comprised of members appointed by state legislative leaders.

Republican supporters of the legislation say it takes the politics out of election administration, but experts say it could result in a nightmare scenario of deadlocked election boards unable to complete the basic tasks of election administration.