The U.S. Supreme Court concluded a momentous term in June, resolving hot-button cases involving gun rights, election law, social media platforms and presidential immunity—just to name a few. While many of the court's opinions will have major implications for Americans, it is the court's crackdown on the power of government regulators that may have the most profound effect of all. Last term's rulings left federal agencies in a weaker position than at any time in the last 50 years.