United States v. Hemani · ¶77

This justification, too, appears to confict with our precedents. Congress cannot regulate the possession of every thing that ever traveled across state lines. Alderman, 562 U. S., at 1167 (opinion of Thomas, J.). As a statutory matter, Congress required no more. But, treating Congress's “jurisdictional element” as dispositive “could very well remove any limit on the commerce power” and “would trespass on traditional state police powers.” Ibid. It would also render meaningless this Court's decisions requiring that exercises of the commerce power ft within defined categories. Morrison, 529 U. S., at 608–609.

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