Opinion | The Supreme Court Just Helped Save American Democracy From Trumpism

In a 6-to-3 vote, the Supreme Court not only declined to dismiss the case; it also flatly rejected the independent state legislature doctrine. Chief Justice John Roberts — writing for a majority that included Justices Sonia Sotomayor, Elena Kagan, Brett Kavanaugh, Amy Coney Barrett and Ketanji Brown Jackson — was unequivocal. “The elections clause,” Chief Justice Roberts declared, “does not insulate state legislatures from the ordinary exercise of state judicial review.”

Or, to put it another way, the relevant provisions of the federal Constitution did not grant state legislatures independent powers that exempt them from the normal operations of state constitutional law. Chief Justice Roberts cited previous Supreme Court authority rejecting the idea that the federal Constitution endows “the legislature of the state with power to enact laws in any manner other than that in which the Constitution of the state has provided that laws shall be enacted.”

The implications are profound. In regard to 2020, the Supreme Court’s decision strips away the foundation of G.O.P. arguments that the election was legally problematic because of state court interventions. Such interventions did not inherently violate the federal Constitution, and the state legislatures did not have extraordinary constitutional autonomy to independently set election rules.

In regard to 2024 and beyond, the Supreme Court’s decision eliminates the ability of a rogue legislature to set new electoral rules immune from judicial review. State legislatures will still be accountable for following both federal and state constitutional law. In other words, the conventional checks and balances of American law will still apply.

Trump’s coup attempt was a national trauma, but if there’s a silver lining to be found in that dark cloud, it’s that the political and judicial branches of American government have responded to the crisis. Late last year, Congress passed significant reforms to the Electoral Count Act that were designed to clarify the ambiguities in the original act and to reaffirm Congress’s and the vice president’s limited roles in counting state electoral votes.

And on Tuesday, a supermajority of the Supreme Court, including both Democratic and Republican appointees, reaffirmed the American constitutional order. State legislatures are not an electoral law unto themselves, and while Moore v. Harper does not guarantee that elections will be flawless, it does protect the vital role of courts in the American system. The 2020 election was sound. The 2024 election is now safer. The Supreme Court has done its part to defend American democracy from the MAGA movement’s constitutional corruption.

The Times is committed to publishing a diversity of letters to the editor. We’d like to hear what you think about this or any of our articles. Here are some tips. And here’s our email: [email protected].

Follow The New York Times Opinion section on Facebook, Twitter (@NYTopinion) and Instagram.