Amalgamated Association of Street v. Wisconsin Employment Relations Board

340 U.S. 383 · Decided February 26, 1951 · Supreme Court of the United States

At a glance

Amalgamated Association of Street v. Wisconsin Employment Relations Board was decided on February 26, 1951 by a vote of 6–3. The Court reversed the lower court's decision. Chief Justice Fred M. Vinson wrote the opinion of the Court. SCDB classifies its main issue as “Federal preemption of state legislation or regulation” in the Federalism area.

Read the opinion

• CourtListener (Free Law Project) — opinion text
• Library of Congress — official U.S. Reports scan

Case details

How the Justices voted

Full case caption

Amalgamated Association of Street, Electric Railway & Motor Coach Employees of America, Division 998, et al. v. Wisconsin Employment Relations Board

SCDB identifiers: case 1950-032, docket 1950-032-01.

Related decisions

Other cases on “Federal preemption of state legislation or regulation”

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Cases on the same legal provision: Labor-Management Relations Act

• National Labor Relations Board v. Pittsburgh Steamship Co.
  340 U.S. 498Decided February 26, 19519–0Felix Frankfurter
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  340 U.S. 361Decided January 15, 19518–0Sherman Minton
• National Labor Relations Board v. Highland Park Manufacturing Co.
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• National Labor Relations Board v. International Rice Milling Co., Inc.
  341 U.S. 665Decided June 4, 19519–0Harold H. Burton
• National Labor Relations Board v. Denver Building & Construction Trades Council
  341 U.S. 675Decided June 4, 19516–3Harold H. Burton
• International Brotherhood of Electrical Workers v. National Labor Relations Board
  341 U.S. 694Decided June 4, 19516–3Harold H. Burton

Same Term, same area (Federalism)

• Panhandle Eastern Pipe Line Co. v. Michigan Public Service Commission
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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