Kleindienst v. Mandel

408 U.S. 753 · Decided June 29, 1972 · Supreme Court of the United States

At a glance

Kleindienst v. Mandel was decided on June 29, 1972 by a vote of 6–3. The Court reversed the lower court's decision. Justice Harry A. Blackmun wrote the opinion of the Court. SCDB classifies its main issue as “Internal security legislation” in the First Amendment 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

Kleindienst, Attorney General, et al. v. Mandel et al.

SCDB identifiers: case 1971-177, docket 1971-177-01.

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Other cases on “Internal security legislation”

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Cases on the same legal provision: Immigration and Nationality statutes

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Same Term, same area (First Amendment)

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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