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Response or Comment

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Congress has exclusive power to regulate interstate commerce, so far as it admits of a uniform system of regulation, and a failure on its part to regulate in a given case is tantamount to a declaration that such commerce shall remain free and unrestricted. Brown v. Houston, 114 U. S. 622; Leisy v. Hardin, 135 U. S. 100. The states are, in all such cases, without jurisdiction to regulate, irrespective of what Congress has or has not done.