Introduction In the appeal of the Moore Transition Tax case, the U.S. Supreme Court has agreed to answer the following question: 22-800 MOORE V. UNITED STATES DECISION BELOW: 36 F.4TH 930 CERT. GRANTED 6/26/2023 QUESTION PRESENTED: The Sixteenth Amendment authorizes Congress to lay "taxes on incomes ... without apportionment among the several States." Beginning with Professor @Gabriel_Zucman Discusses A US Wealth Tax, Taxation Of Americans Abroad And FATCA