Felix Frankfurter,
Callanan v. United States — Opinion of the Court
“ He argues that Congress by combining the conspiracy and the substantive offense in one provision, § 1951, manifested an intent not to punish commission of two offenses cumulatively. Unlike the merger doctrine, petitioner's position does not question that the Government could charge a conspiracy even when the substantive crime that was its object had been completed. His concern is with the punitive consequences of the choice thus open to the Government; it can indict for both or either offense, but, petitioner contends, it can punish only for one. ”
