Sovereign immunity in the United States

In United States law, the federal government as well as state and tribal governments generally enjoy sovereign immunity from lawsuits, although in some cases this immunity has been waived by law. Local governments in most jurisdictions enjoy immunity from some forms of suit, particularly in tort. The Foreign Sovereign Immunities Act provides foreign governments, including state-owned companies, with a related form of immunity—state immunity—that shields them from lawsuits except in relation to certain actions relating to commercial activity in the United States. The principle of sovereign immunity in US law was inherited from the English common law legal maxim rex non potest peccare, meaning "the king can do no wrong."

In the United States, the federal government has sovereign immunity and may not be sued unless it has waived its immunity or consented to suit. The United States as a sovereign is immune from suit unless it unequivocally consents to being sued. The United States Supreme Court in Price v. United States observed: "It is an axiom of our jurisprudence. The government is not liable to suit unless it consents thereto, and its liability in suit cannot be extended beyond the plain language of the statute authorizing it."

The principle was not mentioned in the original United States Constitution. The courts have recognized it both as a principle that was inherited from English common law, and as a practical, logical inference (that the government cannot be compelled by the courts because it is the power of the government that creates the courts in the first place).

The United States has waived sovereign immunity to a limited extent, mainly through the Federal Tort Claims Act, which waives the immunity if a tortious act of a federal employee causes damage, and the Tucker Act, which waives the immunity over claims arising out of contracts to which the federal government is a party. The Federal Tort Claims Act and the Tucker Act are not the broad waivers of sovereign immunity they might appear to be, as there are a number of statutory exceptions and judicially fashioned limiting doctrines applicable to both. Title 28 U.S.C. § 1331 confers federal question jurisdiction on district courts, but this statute has been held not to be a blanket waiver of sovereign immunity on the part of the federal government.

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