This Wednesday, the Supreme Court will hear a case that poses the most direct challenge yet to the legitimacy of the modern federal government. The right-wing legal movement’s target is the “administrative state”—the agencies and institutions that set standards for safety in the workplace, limit environmental hazards and damage, and impose rules on financial markets to ensure their stability and basic fairness, among many other important things. The case, Securities and Exchange Commission v. Jarkesy, threatens all of that. Terrifyingly, this gambit might succeed. The case involves garden-variety securities fraud. George R. Jarkesy Jr., a right-wing activist and conservative-radio talk-show host, ran a pair of investment funds with $24 million in assets. But he misrepresented how the funds were run, paid himself and his partner exorbitant fees, and inflated the assets’ value. As punishment, the SEC fined him several hundred thousand dollars and prohibited him from working in some parts of the securities industry—very standard stuff. Jarkesy responded with what can be described only as chutzpah. He didn’t just contest the SEC’s ruling; he alleged …