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Congress's power to override a presidential veto requires only two-thirds of a quorum in each house to support it, not two-thirds of all the members of each house.
Missouri Pacific Railroad Company v. Kansas, 248U.S. 276 (1919), was a United States Supreme Court case in which the court held that congress's power to override a presidential veto requires only two-thirds of a quorum in each house to support it, not two-thirds of all the members of each house.
References
Missouri Pacific Railroad Company v. Kansas, 248U.S.276 (1919).
Lieberman, Jethro K. (1999). "Veto Power". A Practical Companion to the Constitution. p. 529.
External links
Text of Missouri Pacific Railroad Company v. Kansas, 248U.S. 276 (1919) is available from: CornellFindlawJustia