State Sovereign Immunity (11th Amendment)

The Eleventh Amendment and the broader doctrine of state sovereign immunity bar federal courts from hearing suits brought against a state by its own citizens or by citizens of another state or foreign country. The Supreme Court has interpreted this immunity broadly, extending it beyond the text of the Eleventh Amendment to encompass a general principle of state sovereign immunity rooted in the structure of the Constitution (Alden v. Maine, 1999).

Sovereign immunity can be overcome in several ways. First, a state may waive its immunity by consenting to suit, but the waiver must be unequivocal. Second, Congress may abrogate state sovereign immunity, but only when acting pursuant to its enforcement power under Section 5 of the Fourteenth Amendment, not under Article I powers such as the Commerce Clause (Seminole Tribe of Florida v. Florida, 1996). To validly abrogate, Congress must make its intention unmistakably clear and the legislation must be congruent and proportional to the constitutional violations it seeks to remedy (City of Boerne v. Flores, 1997). Third, under the Ex parte Young doctrine (1908), suits for prospective injunctive relief may be brought against state officials in their official capacity, even though the state itself is immune.

Sovereign immunity applies to suits against the state itself, its agencies, and its arms (including state universities in most contexts), but it does not bar suits against local governments, municipalities, or counties. The distinction between state entities (immune) and local entities (not immune) frequently arises on exams. The doctrine remains controversial, with critics arguing it allows states to violate federal law without accountability.