Summary

Portrait of James Clark McReynolds James Clark McReynolds Helvering v. Therrell — Opinion of the Court

No state may tax appropriate means which the United States may employ for exercising their delegated powers; the United States may not tax instrumentalities which a state may employ in the discharge of her essential governmental duties-that is those duties which the framers intended each member of the Union would assume in order adequately to function under the form of government guaranteed by the Constitution.
Source: Wikisource

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