Whether the Supreme Court was bound by the Wisconsin Supreme Court’s characterization of the statute as punishing thought rather than conduct.
Holding
No. Although the Court must accept a state court’s authoritative construction of state law, it may independently assess the statute’s operative effect for purposes of the federal First Amendment.
Reasoning
A state court’s definition of the meaning of statutory language ordinarily binds the U.S. Supreme Court. But the Wisconsin Supreme Court had not resolved an ambiguity in the words of the penalty-enhancement statute. Instead, it characterized the statute’s practical constitutional effect as punishment of motive or thought.
Whether a statute, as properly understood, burdens conduct, expression, or protected belief is a federal constitutional question. The Court therefore made its own judgment about the effect of Wisconsin’s law rather than treating the state court’s First Amendment characterization as controlling.