Whether a general verdict may stand when the jury was authorized to convict under any of several statutory grounds and one of those grounds is unconstitutional.
Holding
No. Because the general verdict may have rested solely on the unconstitutional ground, the conviction could not be sustained.
Reasoning
The charging document alleged all three prohibited purposes, but the trial court instructed the jury in the disjunctive: it could find Stromberg guilty if the flag was displayed for any one of the three purposes. The verdict did not identify which ground the jury accepted.
The California appellate court treated the statute as divisible and reasoned that the conviction could survive because the clauses addressing anarchistic action and seditious propaganda were valid. The Supreme Court rejected that approach. Separability of statutory provisions does not cure a conviction when the jury may have relied on an invalid provision.
The uncertainty was consequential rather than theoretical. The trial record showed that the prosecutor specifically urged the jury that it could convict under the first clause alone. Since the Court could not determine that the verdict rested on a valid clause, the conviction had to be set aside if the first clause was unconstitutional.