Suing foreign sovereigns in the courts in the United States raises certain issues that are of no concern if there is a non-sovereign on the other side. In this column, we look at a recent Supreme Court decision in which the court made clear that, at least with respect to choice of law, a sovereign should be treated exactly the same as a private party. See Cassirer v. Thyssen-Bornemisza Collection Foundation, 596 U.S. ___ (2022).