OCTOBER TERM 1971 · DECIDED JUNE 19, 1972 · 8–0

407 U.S. 297 · No. 70-153 · Argued February 24, 1972

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United States v. United States District Court for the Eastern District of Michigan

AffirmedFinal ruling
wiretappingpresidential powernational securityprivacy rightsFourth Amendment

Opinion of the Court by Justice Powell, joined by Justice Douglas

The Supreme Court ruled that the President cannot order wiretaps on Americans suspected of threatening domestic security without first getting a judge's approval, rejecting the government's claim of inherent constitutional power to bypass warrants in internal security cases.

The decision drew a sharp line between foreign-intelligence surveillance, which it left untouched, and domestic surveillance of citizens and groups seen as subversive, requiring the same kind of judicial check that applies to ordinary criminal wiretaps.

How it got here: A federal trial court ordered disclosure of wiretap records; the Sixth Circuit denied the government's mandamus petition to block that order; the government sought Supreme Court review.

The Case in Depth

What happened

Federal prosecutors charged Lawrence Plamondon and two co-defendants with conspiring to destroy government property, including the bombing of a CIA office in Ann Arbor, Michigan. During pretrial proceedings, the defense discovered the government had wiretapped Plamondon's conversations without a warrant, and moved to see the surveillance records to check whether the wiretaps had tainted the case against them.

The question before the Court

Could the President, acting through the Attorney General, order wiretaps on suspected domestic subversives without ever getting a judge's approval?

The Court's answer

No — the Court ruled that the President cannot order warrantless wiretaps on domestic organizations suspected of threatening the government's security, even acting through the Attorney General to protect against subversion. The Fourth Amendment's warrant requirement applies to this kind of domestic security surveillance just as it does to ordinary criminal investigations, because the risks of unchecked executive discretion and chilled political dissent are too great.

The Court reached this holding purely as a matter of constitutional law, finding that the wiretap statute, Title III, did not actually authorize warrantless domestic security surveillance one way or the other. It also stressed that its ruling was limited to purely domestic threats, leaving open whether the President has broader warrantless power when foreign nations or their agents are involved.

Curious how the Court got there? See the step-by-step legal reasoning →

Why it matters

The ruling meant the Justice Department could no longer wiretap domestic political groups or dissidents on the President's say-so alone; agents now need a judge to sign off, just as in ordinary criminal cases. It gave activists, protest organizations, and ordinary citizens a concrete legal shield against secret government eavesdropping conducted in the name of national security.

What changes now

Because the wiretap was unlawful without a warrant, the Court held that the earlier case Alderman v. United States controlled, requiring the government to disclose the intercepted conversations to Plamondon so the defense could check for taint. The ruling is final on the domestic security question, though it explicitly left open how foreign-intelligence wiretaps should be handled, and it invited Congress to write specific procedures for domestic security warrants, which Congress later did through the Foreign Intelligence Surveillance Act.

What this does not decide

The Court expressly said its ruling covered only surveillance of domestic organizations with no significant foreign connection, and took no position on the President's power to wiretap without a warrant when foreign powers or their agents are involved. It also did not prescribe the specific warrant procedures Congress might adopt for domestic security cases.

Concurrences and dissents

Concurrence — Justice Douglas

Justice Douglas joined the majority in full but wrote separately to emphasize the historical dangers of unchecked government surveillance, cataloguing past abuses of warrantless searches and citing statistics showing warrantless wiretaps lasted far longer than court-ordered ones. He argued the case fit within a long history of government overreach against dissidents that the Fourth Amendment was designed to prevent.

Concurrence — Justice White

Justice White agreed the wiretap records should be disclosed but would have decided the case on statutory grounds alone, without reaching the constitutional question. He concluded the Attorney General's affidavit did not satisfy the specific requirements Congress wrote into § 2511(3) for a lawful warrantless domestic security wiretap, so the interception was already illegal under the statute itself.

How the Court got there

The legal reasoning, step by step

  1. The Court first read the wiretap statute, Title III, and concluded that a provision the government relied on, § 2511(3), did not actually grant the President any surveillance power; it was a neutral disclaimer stating that the statute did not touch whatever constitutional power the President already had, leaving the real question to be answered by the Constitution itself.
  2. Having found no statutory authorization, the Court turned to the Fourth Amendment's warrant clause, explaining that the amendment's protections extend to private conversations, not just physical searches of homes, so wiretapping is a 'search' the Amendment governs.
  3. The Court weighed the government's interest in protecting domestic security against the individual's interest in privacy and free speech, noting that national security investigations often threaten First Amendment activity, making judicial oversight especially important.
  4. The Court rejected the government's argument that judges lack the expertise or ability to keep security information secret, finding that judges already handle sensitive matters responsibly and that a neutral magistrate's review is the traditional way to prevent unchecked executive discretion.
  5. Applying this reasoning, the Court held that when domestic organizations, rather than foreign powers, are the target, the President must get advance judicial approval before wiretapping, though Congress remains free to set different, tailored procedures for domestic security cases than those used for ordinary crimes.

Doctrinal impact

Laws and provisions at issue

Fourth Amendment

Protects people against unreasonable government searches, including secret wiretapping of private conversations.

Omnibus Crime Control and Safe Streets Act § 2511(3)

A 1968 wiretapping law provision the government claimed preserved the President's power to wiretap without a warrant.

Article II, Section 1

Gives the President the duty to preserve and protect the Constitution, cited as a source of security-related power.

Cases affected by this decision

Reaffirms Alderman v. United States (394 U.S. 165)

The Court relied on Alderman to require disclosure of the unlawfully intercepted conversations to the defendant.

Distinguishes Katz v. United States (389 U.S. 347)

The Court answered a question Katz had explicitly left open about national security wiretaps without disturbing its core holding.

Supreme Court Opinion

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United States v. United States District Court for the Eastern District of Michigan | SCOTUS Reporter