Summary

Joseph P. Bradley Brown v. Houston — Opinion of the Court

It is a plain regulation of interstate commerce, a regulation extending to prohibition. Whatever may be the power of a state over commerce that is completely internal, it can no more prohibit or regulate that which is interstate than it can that which is with foreign nations.' In short, it may be laid down as the settled doctrine of this court, at this day, that a state can no more regulate or impede commerce among the several states than it can regulate or impede commerce with foreign nations.
Source: Wikisource

Joseph P. Bradley Brown v. Houston — Opinion of the Court

We do not mean to say that if a tax collector should be stationed at every ferry and railroad depot in the city of New York, charged with the duty of collecting a tax on every wagon-load or car-load of produce and merchandise brought into the city, that it would not be a regulation of, and restraint upon, interstate commerce, so far as the tax should be imposed on articles brought from other states.
Source: Wikisource

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