Btatreasure

In 1793, the Supreme Court held in Chisholm v. Georgia that Article III, § 2 of the United States Constitution, which granted diversity jurisdiction to the federal courts, allowed lawsuits "between a State and Citizens of another State" as the text reads. In 1795, the Eleventh Amendment was ratified in response to this ruling, removing federal judicial jurisdiction from lawsuits "prosecuted against one of the United States by Citizens of another State, or by Citizens or Subjects of any Foreign State". The validity and retroactivity of the Eleventh Amendment was affirmed in the 1798 case Hollingsworth v. Virginia.

In Hans v. Louisiana, the Supreme Court of the United States held that the Eleventh Amendment re-affirms that states possess sovereign immunity and are therefore immune from being sued in federal court without their consent. In later cases, the Supreme Court has strengthened state sovereign immunity considerably. In Blatchford v. Native Village of Noatak, the court explained that

we have understood the Eleventh Amendment to stand not so much for what it says, but for the presupposition of our constitutional structure which it confirms: that the States entered the federal system with their sovereignty intact; that the judicial authority in Article III is limited by this sovereignty, and that a State will therefore not be subject to suit in federal court unless it has consented to suit, either expressly or in the "plan of the convention." States may consent to suit, and therefore waive their Eleventh Amendment immunity by removing a case from state court to federal court. See Lapides v. Board of Regents of University System of Georgia.

(Citations omitted). In Alden v. Maine, the Court explained that while it has

sometimes referred to the States’ immunity from suit as "Eleventh Amendment immunity[,]" [that] phrase is [a] convenient shorthand but something of a misnomer, [because] the sovereign immunity of the States neither derives from nor is limited by the terms of the Eleventh Amendment. Rather, as the Constitution's structure, and its history, and the authoritative interpretations by this Court make clear, the States’ immunity from suit is a fundamental aspect of the sovereignty which the States enjoyed before the ratification of the Constitution, and which they retain today (either literally or by virtue of their admission into the Union upon an equal footing with the other States) except as altered by the plan of the Convention or certain constitutional Amendments.

Writing for the court in Alden, Justice Anthony Kennedy argued that in view of this, and given the limited nature of congressional power delegated by the original unamended Constitution, the court could not "conclude that the specific Article I powers delegated to Congress necessarily include, by virtue of the Necessary and Proper Clause or otherwise, the incidental authority to subject the States to private suits as a means of achieving objectives otherwise within the scope of the enumerated powers."

However, a "consequence of [the] Court's recognition of pre-ratification sovereignty as the source of immunity from suit is that only States and arms of the State possess immunity from suits authorized by federal law." Northern Ins. Co. of N. Y. v. Chatham County (emphases added). Thus, cities and municipalities lack sovereign immunity, Jinks v. Richland County, and counties are not generally considered to have sovereign immunity, even when they "exercise a 'slice of state power.'" Lake Country Estates, Inc. v. Tahoe Regional Planning Agency.

Separately, sovereign immunity of a state from lawsuits in other states have been in question. The Supreme Court ruled in Nevada v. Hall (1977) that states are not constitutionally immune from being named in lawsuits filed in other states. In the intervening years, many states developed legislation that recognize sovereign immunity of other states; since 1979, there had only be 14 legal cases that did involve a state being named as a litigant in a case heard in another state. The Supreme Court overturned Nevada in its 2019 decision of Franchise Tax Board of California v. Hyatt (Docket 17-1299) that states did enjoy constitutional sovereign immunity from lawsuits in other states.^[1]