Whether Dan, Hirsch, and Broslawsky had a sufficient live controversy to seek federal equitable relief against enforcement of the Criminal Syndicalism Act.
Holding
No. Their subjective inhibition and uncertainty, without a threat or realistic likelihood of prosecution, did not establish a controversy warranting federal intervention.
Reasoning
Harris was a proper plaintiff because California had indicted and was actively prosecuting him. His dispute with the State was immediate and concrete.
The other plaintiffs alleged only that the statute's existence and Harris's prosecution made them feel inhibited or uncertain about engaging in political advocacy and teaching. They did not allege that the prosecutor had threatened them, that prosecution was likely, or even that prosecution was remotely possible.
A federal suit seeking to halt a state criminal prosecution is an extraordinary matter. Persons whose fears of prosecution are speculative or imaginary cannot use another person's pending prosecution to obtain federal equitable relief.