CaseTrail

National supremacy, intergovernmental tax immunity: Supreme Court decisions

Every U.S. Supreme Court decision from the 1946 through 2025 Terms that the Supreme Court Database classifies under the issue “National supremacy, intergovernmental tax immunity,” part of the Federalism area.

13decisions
69%favorable to the petitioner
38%unanimous
4altered precedent or struck a law

Decisions by decade

1940s1
1950s1
1960s3
1970s2
1980s2
1990s4

Most majority opinions

Legal provisions most often involved

4 U.S.C. § 1112
Article VI, Section 2 (supremacy clause)2
31 U.S.C. § 31241
State or local law or regulation1
28 U.S.C. § 9601
Internal Revenue Code1
26 U.S.C. § 44911
Twenty-First Amendment1

All 13 decisions, newest first

Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error