And as for the argument that criticism [of government foreign policy] may give aid and comfort to some enemy, that is a form of blackmail unworthy of those who profess it. If it is to be accepted, we will have an end to genuine discussion of foreign policies, for it will inevitably be invoked to stop debate and criticism whenever that debate gets acrimonious or the criticism cuts too close to the bone. And to the fevered mind of the FBI, the CIA, and some Senators, criticism always gives aid and comfort to the enemy or cuts too close to
the bone.Henry Steele Commager (1902-1998) American historian, writer, activist
Essay (1965-12-18), “The Problem of Dissent,” Saturday Review
(Source)
Reprinted in Freedom and Order, Part 6 (1966).
Sections of the essay (including this portion) were read into the Congressional Record, Senate Proceedings (1969-06-26), as part of a speech by former Senator Wayne Morse (D-Oregon) at the commencement of Fairleigh Dickinson University (1969-06-07); Morse's speech was read in by Senator Gary Hart (D-Colo.).

