Montana v. United States

I disagree that the Government was estopped from litigating its claim in federal court by virtue of the earlier action in the courts of Montana. And on the merits I think the Montana gross receipts tax is constitutionally infirm. Thus, I would affirm the decision below.

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It is basic that the principle of collateral estoppel "must be confined to situations where the matter raised in the second suit is identical in all respects with that decided in the first proceeding and where the controlling facts . . . remain unchanged.” Commissioner v. Sunnen, 333 U. S. 591, 599-600 (1948). The Court does…