Earl Warren,
Powell v. Cormack — Opinion of the Court
“ Unquestionably, Congress has an interest in preserving its institutional integrity, but in most cases that interest can be sufficiently safeguarded by the exercise of its power to punish its members for disorderly behavior and, in extreme cases, to expel a member with the concurrence of two-thirds. In short, both the intention of the Framers, to the extent it can be determined, and an examination of the basic principles of our democratic system persuade us that the Constitution does not vest in the Congress a discretionary power to deny membership by a majority vote. ”
