No one familiar with the history of his country can deny that Congressional committees are useful; it is necessary to investigate before legislating. But the line between investigating and persecuting is a very fine one, and the junior senator from Wisconsin has stepped over it repeatedly. His primary achievement has been in confusing the public mind as between the internal and the external threats of communism. We must not confuse dissent with disloyalty; we must remember always that accusation is not proof, and that conviction depends upon evidence and due process of the law.