Tell us about your top U.S. Supreme Court or federal appeals court victory over the past year and how you and your team achieved the win.

For 45 years since passage of the Clean Water Act, parties have not known whether to challenge CWA rules in federal district court or courts of appeals, so they filed in both then litigated over which had jurisdiction, wasting time and money. Statutory language suggests most cases go to district court; but the U.S. advocated for court of appeals jurisdiction and courts agreed. In National Association of Manufacturers v. U.S. Department of Defense the Court granted certiorari over U.S. opposition and unanimously agreed with our clients that their challenge to the “Waters of the United States Rule” belongs in district court, providing a clear litigation path. Our close analysis of statutory language, context, and structure produced a clear jurisdictional rule, replacing decades of costly confusion.