In 2022, the Ohio Supreme Court struck down the state's Republican-drawn congressional map. Then it struck down the redrawn version too. Both times the court found the same defect: the map violated the anti-gerrymandering rules Ohio voters had written into their own constitution four years earlier. Both times, the map got used in the election anyway.
That is the whole story of the 2018 reform in two sentences. It works. It also doesn't.
What voters actually passed in 2018
In May 2018, three out of four Ohio voters approved Issue 1, adding Article XIX to the state constitution. The mechanics matter, because they are what everything after turns on. The legislature draws the congressional map first, but only if three-fifths of each chamber, including half the minority party, sign off. If that fails, a seven-member redistricting commission tries. If that fails too, the legislature can pass a map on a simple party-line vote.
The reform's teeth are in the reward it attaches. A map passed with real bipartisan support is good for ten years. A map jammed through on one party's votes is good for only four, and it has to clear the anti-gerrymander standards: no plan that "unduly favors" a party, no needless splitting of counties and cities. The bet was that fragile, short-lived partisan maps would push both sides to negotiate a lasting one.
The reform had teeth, briefly
The first test broke the way the reform intended. Republicans drew a map in 2021. On January 14, 2022, the court voided it. Lawmakers redrew it. On July 19, 2022, the court voided that one too, 4-3, with Republican Chief Justice Maureen O'Connor casting the deciding vote against her own party's map on Article XIX grounds.
Then the limits showed. Challengers had filed in March, with a May primary bearing down, and the court let the unconstitutional map stand for 2022 rather than blow up the election calendar. It governed 2024 as well. Ohioans voted twice on a map their highest court had ruled illegal. O'Connor hit the judicial age limit and retired. The court that replaced her leans 6-1 Republican.
How Republicans locked in 12-3
That four-year map expired after 2024, exactly as designed. The 2025 round is where the reform's logic got turned against it. On October 31, 2025, the redistricting commission passed a new congressional map on a 7-0 vote. Unanimous. Both Democratic legislative leaders, Nickie Antonio and Dani Isaacsohn, voted yes after negotiating a deal to shore up Representative Emilia Sykes's Akron-area seat.
The map favors Republicans in 12 of 15 districts. Because it carried bipartisan votes, it is good through 2030 and nearly immune to the Article XIX challenge that sank the last one. Secretary of State Frank LaRose spelled out the calculation: if opponents challenged the map and lost, a court would likely have forced Ohio back onto the old 10-5 lines for 2026. The ten-year bonus the amendment offered for bipartisanship became the lever that produced a 12-3 map almost no one can now contest.
The money follows the safe seats
The gerrymander decides most Ohio races before anyone votes. A separate ruling decides how cash floods the few that are left. According to the Ohio Capital Journal on July 7, 2026, the U.S. Supreme Court struck down 1970s-era limits on how much a political party can spend in coordination with its own candidates, a 6-3 decision written by Justice Brett Kavanaugh. The case started in Ohio, filed by J.D. Vance and Steve Chabot in 2022. With the map settled, unlimited coordinated party money concentrates on the handful of districts still genuinely in play.
The seats that still decide it
The 2018 amendment did its job and exposed its ceiling in the same decade. It handed the court a real rule and voters a map voided twice, then watched that map run two elections and get replaced by a 12-3 version insulated by the reform's own bipartisan clause. Whether Article XIX still constrains anyone depends on the 6-1 court now reading it and the commission members Ohio seats through its statewide elections. You do not vote on the map. You vote for the people who draw it and the justices who decide whether it stands.