Republicans ask the Supreme Court to disenfranchise thousands of swing state voters

The Republican Party wants the Supreme Court to weigh in on a nauseatingly complicated voting rights case, which could potentially disenfranchise thousands of presidential voters in the swing state of Arizona. The case is known as Republican National Committee v. Mi Familia Vota.

The case involves an astoundingly convoluted system Arizona uses to register certain voters — one that emerged from 20 years of conflicting state and federal laws, plus seemingly endless litigation over those laws. Among other things, Republicans claim that several thousand Arizona voters should be allowed to vote only...