In a nutshell, Chevron had deferred to federal agencies the authority to determine what regulations should be imposed on businesses when the actual law was ambiguous. This has resulted in a massive increase in federal power over the last forty years.
The Supreme Court has now taken that authority from the federal government and given it to the courts where it belongs. Courts, not bureaucrats, are to interpret the law. Courts are more likely to be disinterested and objective; unelected, unaccountable bureaucrats are more likely to have ideological agendas.
Paula Bolyard writes at PJ Media:
Today, the Supreme Court voted to overrule the so-called Chevron deference in a 6-3 decision. The ruling is a HUGE victory for those who hate the massive power the administrative state has amassed in recent decades.Bolyard has much more information on this decision and the rationale for it at the link.
Chief Justice John Roberts, writing for the majority, concluded: "The Administrative Procedure Act requires courts to exercise their independent judgment in deciding whether an agency has acted within its statutory authority, and courts may not defer to an agency interpretation of the law simply because a statute is ambiguous; Chevron is overruled."
In the most basic terms, the Chevron deference (also called the Chevron doctrine) allows the courts, through a two-step process, to defer to "reasonable" administrative agency interpretations if a federal statute is unclear or ambiguous. It was essentially a get-out-of-jail-free card for presidents and agency hacks who liked to claim that a law says whatever they want it to say.
It gave federal agencies broad authority to regulate everything from health care to immigration to women's sports to COVID jabs.
Tossing Chevron into the dumpster was a necessary first step in cutting big government down to size and returning government to its constitutional role as a servant of the people, not our master. This decision stands with Dobbs as perhaps the two most important decisions SCOTUS has made in decades.