Felix Frankfurter,
Freeman v. Hewit — Opinion of the Court
“ It is true that the existence of a tax on its local commerce detracts from the deterrent effect of a tax on interstate commerce to the extent that it removes the temptation to sell the goods locally. But the fact of such a tax, in any event, puts impediments upon the currents of commerce across the State line, while the aim of the Commerce Clause was precisely to prevent States from exacting toll from those engaged in national commerce. The Commerce Clause does not involve an exercise in the logic of empty categories. ”
