Robert H. Jackson, Dennis v. United States — Concurring Opinion
“ The Communist Party, nevertheless, does not seek its strength primarily in numbers. Its aim is a relatively small party whose strength is in selected, dedicated, indoctrinated, and rigidly disciplined members. From established policy it tolerates no deviation and no debate. It seeks members that are, or may be, secreted in strategic posts in transportation, communications, industry, government, and especially in labor unions where it can compel employers to accept and retain its members. ”
