Learning Resources, Inc. v. Trump · ¶299

If the Federal Government's constitutional power to “regulate” foreign commerce includes tariffs (as this Court has repeatedly said), and if the power to “regulate . . . importation” is the power to regulate foreign commerce with respect to imports (as it plainly is), then IEEPA's authorization for the President to “regulate . . . importation” clearly encompasses tariffs. Historical usage and that textual syllogism further buttress the dictionary definitions and help establish that tariffs are a means to regulate importation.

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