Whether Congress may, consistently with the Fourteenth Amendment, strip a citizen of United States citizenship for voting in a foreign election when the citizen has not voluntarily relinquished citizenship.
Holding
No. The Fourteenth Amendment protects a citizen from Congress's forcible destruction of citizenship; citizenship may not be taken away without the citizen's voluntary relinquishment.
Reasoning
Congress has no express constitutional power to take citizenship away. Nor does a general implied power flowing from national sovereignty or the foreign-affairs power supply that authority. In the American constitutional system, the people are sovereign, and the Federal Government has only powers granted by the Constitution or necessary and proper to execute granted powers.
The Citizenship Clause declares that all persons born or naturalized in the United States and subject to its jurisdiction are citizens. The Court read that language as establishing a secure and continuing constitutional status, not a citizenship that Congress may cancel whenever it believes doing so would serve an otherwise valid governmental objective.
The Clause's history reinforced this reading. A central purpose of adding it to the Fourteenth Amendment was to ensure that the citizenship newly secured for formerly enslaved people could not be undone by a later Congress. That purpose would be defeated if Congress could use a general power, such as its authority over foreign affairs, to remove citizenship involuntarily.
Historical statements and decisions also supported the distinction between Congress's power to establish rules for naturalization and a supposed power to divest someone of citizenship once acquired. In particular, the Court relied on the principle expressed in Osborn v. Bank of the United States and United States v. Wong Kim Ark that Congress may confer citizenship through naturalization but may not abridge citizenship secured by the Constitution.
Voting in a foreign election may be deliberate conduct, but it is not itself a voluntary renunciation of American citizenship. Because Afroyim never voluntarily gave up his citizenship, § 401(e) could not constitutionally make him lose it.