With the Supreme Court removing the federal courts from deciding partisan gerrymander cases, state courts are becoming a crucial battleground for opponents of skewed maps. Joshua A. Douglas, an expert on state constitution protections for voting at the University of Kentucky, said the growing body of legal precedents in state gerrymandering cases was important because many state constitutions share similar protections for elections and voters, often derived from one another.

Courts in Pennsylvania, Maryland, Alaska, New York and, last week, New Mexico have ruled that partisan gerrymanders can be unconstitutional. So have courts in Ohio and North Carolina. However, the Ohio court proved unable to force the Legislature to comply with its rulings, and the North Carolina decision was overturned in April after elections shifted the court’s partisan balance from Democratic to Republican.

The Kentucky Supreme Court will hear a challenge to that state’s congressional and legislative maps in September. And a lawsuit contesting an extreme Republican gerrymander of the Wisconsin Legislature is widely expected after an April election gave progressives a majority on the state’s high court.

Perhaps the closest analogy to the Utah gerrymander is in Nashville, where the Republican-run state legislature’s latest congressional map divided the city’s onetime Democratic-majority House district among three heavily Republican districts. Democrats have not challenged the map in state courts, presumably because they see little prospect of winning in a Supreme Court dominated by Republican appointees.

In Utah’s case, however, the State Supreme Court’s five justices do not have reputations for bending easily to political winds. They are chosen through a merit-based selection process.

The Utah plaintiffs — the state chapter of the League of Women Voters; the advocacy group Mormon Women for Ethical Government and a handful of Utah voters — accuse the State Legislature not just of illegally gerrymandering the state’s congressional map but of ignoring voters’ explicit instructions not to do so.

The State Constitution allows voters to enact new laws, and to repeal ones that the Legislature enacted, through ballot initiatives. In 2018, voters narrowly approved a law outlawing maps that were unduly skewed to favor a candidate or party, and allowing voters to enforce that mandate through lawsuits. The Legislature later repealed that law and then drew the congressional map that quartered Salt Lake County.