Mayo v. United States’s Empirical Analysis
319 U.S. 441 · 1943
Citation profile
106 federal appellate · 26 district · 48 state decisions
How this case has been cited
Cited by 314 later decisions (42 by the Supreme Court) — most recently August 2022 · most notably Clinton v. Jones (1997), Spector Motor Service, Inc. v. O'Connor (1951)
106 federal appellate · 26 district · 48 state decisions — followed in 15 states
Later decisions citing this case, by decade. The current decade is in progress, and our corpus holds fewer opinions from the most recent years, so the latest bars are undercounted — not a real decline.
Relationships
Relies on M'Culloch v. State of Maryland · United States v. Butler · Graves v. People of State of New York O'Keefe · Alabama v. King & Boozer · State of Arizona v. State of California
Most-quoted passages
The sentences later courts lift from this opinion, ranked by how many decisions quote each — the parts of the opinion doing the work. These counts are smaller than the citation total above because most of the 314 citing decisions cite the case generally; a passage count includes only decisions quoting that exact language verbatim.
“the activities of the Federal Government are free from regulation by any state.”
15 later decisions quote this exact passage · from the majority“before executing a function of government”
9 later decisions quote this exact passage · from the majority““It lies within Congressional power to authorize regulation, including taxation, by the state of federal instrumentalities. . . . There are matters of local concern within the scope of federal power which in the silence of Congress may be regulated in such manner as does not impair national uniformity. There are federal activities which in the absence of specific Congressional consent may be affected by state regulation.””
1 later decision quote this exact passage · from the majority
How this case has been treated — in progress
Whether each later court followed, distinguished, criticized, or overruled this decision. The treatment classification (task #35) runs highest-cited cases first and lights up here as it reaches this one.