Rendition of the Port of Philadelphia in the mid-1800s.

Cooley v. Board of Wardens 1852

In Cooley v. Board of Wardens (1852) the question before the Supreme Court was whether the grant of power to Congress in Article I Section 8 automatically prohibited all state legislation touching interstate commerce. Speaking for the Court, Justice Benjamin Curtis ruled that when local circumstances made it necessary the states could regulate interstate commerce, providing that such regulations did not conflict with federal law...

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