Whatever else can be said about the second Trump administration, it is always teaching me about parts of the Constitution I had forgotten were even in there.

Case in point: Article I, Section 9, Clause 5 states that “No Tax or Duty shall be laid on Articles exported from any State.” This is known as the export clause, not to be confused with the import-export clause (Article I, Section 10, Clause 2). The Supreme Court has repeatedly held, most recently in 1996’s US v. IBM, that this clause bans Congress and the states from imposing taxes on goods exported from one state to another or from the US to foreign countries.

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