By Joseph Diedrich, Tanner Cook and Madison Beckham ( July 1, 2025, 3:32 PM EDT) -- For nearly 40 years, federal courts applied so-called Chevron deference to administrative agency action. Chevron deference — named after Chevron USA Inc. v. Natural Resources Defense Council Inc., a 1984 U.S. Supreme Court decision upholding a Reagan-era regulatory rulemaking — required federal courts to defer to agencies' interpretations of ambiguous statutes whenever the interpretations were reasonable or permissible....
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