Summary

Portrait of Samuel Freeman Miller Samuel Freeman Miller Kilbourn v. Thompson — Opinion of the Court

Conceding for the sake of the argument that there are cases in which one of the two bodies, that constitute the Congress of the United States, may punish for contempt of its authority, or disregard of its orders, it will scarcely be contended by the most ardent advocate of their power in that respect that it is unlimited.
The powers of Congress itself, when acting through the concurrence of both branches, are dependent solely on the Constitution.
Source: Wikisource

Portrait of Samuel Freeman Miller Samuel Freeman Miller Kilbourn v. Thompson — Opinion of the Court

If we could suppose the members of these bodies so far to forget their high functions and the noble instrument under which they act as to imitate the Long Parliament in the execution of the Chief Magistrate of the nation, or to follow the example of the French Assembly in assuming the function of a court for capital punishment, we are not prepared to say that such an utter perversion of their powers to a criminal purpose would be screened from punishment by the constitutional provision for freedom of debate.
Source: Wikisource

Portrait of Samuel Freeman Miller Samuel Freeman Miller Kilbourn v. Thompson — Opinion of the Court

The increase in the number of States, in their population and wealth, and in the amount of power, if not in its nature to be exercised by the Federal government, presents powerful and growing temptations to those to whom that exercise is intrusted, to overstep the just boundaries of their own department, and enter upon the domain of one of the others, or to assume powers not intrusted to either of them.
Source: Wikisource

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