On January 17, 2024, the U.S. Supreme Court heard oral argument in two cases in which the question presented is whether the Court should overrule its 1984 decision in Chevron, U.S.A., Inc. v. Nat. Res. Def. Council, Inc. That decision produced what became known as the "Chevron judicial deference framework" - the two-step analysis that courts typically invoke when reviewing a federal agency’s interpretation of a statute. This two-part episode repurposes our webinar held in February 2024 and brings together as our guests three renowned administrative law professors, Kent Barnett, Jack Beermann, and Craig Green, and a leading Supreme Court practitioner, Carter Phillips, all of whom are experts on Chevron. In Part I, we first review the Chevron decision and judicial deference framework and the background of the two cases now before the Supreme Court. We then look at the history of judicial review of agency action culminating with the current challenge to Chevron deference, including the origins of judicial deference to agency action, the political shift away from judicial deference, and key post-Chevron decisions. We conclude with a discussion of the principal arguments made to the Supreme Court for upholding Chevron and for overruling Chevron. Alan Kaplinsky, Senior Counsel in Ballard Spahr’s Consumer Financial Services Group, leads the discussion.