The Seneca-Cayuga Tribe of Oklahoma and the Quapaw Tribe of Oklahoma are federally recognized Indian tribes that operate high-stakes bingo games on trust land. They brought this action to enjoin a pending state court suit in which the State of Oklahoma sought to enjoin operation of the bingo games. The federal court held that it was not required to abstain, and issued a preliminary injunction. We affirm.
I.
BACKGROUND
In 1983, the State of Oklahoma sued the Seneca-Cayuga and Quapaw Tribes in separate actions in state court seeking to enjoin the operation of Tribal bingo games, which violate the gaming laws of the state, see Okla.Stat.Ann. tit. 21, §§ 995.1-18 (1981). Shortly thereafter, the Seneca-Cayuga Tribe filed suit in federal court and was granted a preliminary injunction restraining state officials from enforcing state gaming laws on Indian land. The state district court subsequently dismissed the state suits against both Tribes for lack of subject matter jurisdiction, and the Seneca-Cayuga Tribe voluntarily dismissed the federal action. In July 1985, the Supreme Court of Oklahoma reversed the lower state court, holding that the actions were not barred by the Tribes’ sovereign immunity and remanding for further findings on other issues. State ex rel. May v. Seneca-Cayuga Tribe of Oklahoma,
The Tribes brought the present action seeking declaratory and injunctive relief against the State of Oklahoma and the state trial judge, the Honorable Jon D. Douthitt. The parties entered into extensive stipulations of fact, which are set forth briefly as follows. The bingo operations at issue are held in buildings used exclusively for bingo, and located on land held in trust for the Tribes. The players are primarily non-Indians. All or most of the games are in violation of state statutes, and no federal or state taxes are withheld from the prizes. The bingo games provide employment for Tribal members, and income which is used to fund Tribal health and welfare programs.
The State has appealed this preliminary injunction under 28 U.S.C. § 1292(a)(1) (1982). Its primary argument for reversal is that the district court should have abstained under the doctrine of Younger v. Harris,
II.
YOUNGER ABSTENTION
Federal courts have a “virtually unflagging obligation” to exercise the jurisdiction granted them by Congress. See Colorado River Water Conservation Dist. v. United States,
Younger abstention requires an ongoing state judicial (or in a proper case administrative) proceeding, the presence of an important state interest, and an adequate opportunity to raise federal claims in the state proceedings. See Middlesex County Ethics Comm. v. Garden State Bar Ass’n,
In this case, there is clearly an ongoing state judicial proceeding. Litigation in the state system has already reached the Supreme Court of Oklahoma, see Seneca-Cayuga I,
The Oklahoma Supreme Court identified two state interests in the regulation of high-stakes bingo games: preventing the infiltration of organized crime, and protecting the State’s economy and tax base. Seneca-Cayuga,
A. Primacy of Federal Interest
The Constitution grants to Congress the power “To regulate Commerce ... with the Indian Tribes.” U.S. Const, art. I, § 8, cl. 3. The treaties and other agreements that govern the relationship between the Indians and other Americans are part of “the supreme Law of the Land.” Id. art VI, cl. 2. It is Congress that has set the terms under which modern American Indians live, the United States Supreme Court that has shaped the interpretation of those terms, and the federal Bureau of Indian Affairs that has managed the day-to-day interactions with the Tribes. Indeed, Oklahoma, like many other states, was required to disclaim jurisdiction over Indians at statehood. See Oklahoma Enabling Act, ch. 3335, § 3, 34 Stat. 267, 270 (1906); Enabling Act Amendment, ch. 2911, 34 Stat. 1286 (1907); see generally Indian Country, U.S.A., Inc. v. Okla. Tax Comm’n.,
This is not to say that states have not exercised authority over reservation land, especially over non-Indians on such land. Nor is it to say that states have no right to exercise authority over activities in Indian Country. See California v. Cabazon Band of Mission Indians,
In this particular case, the Indian bingo games under attack by the State promote the important congressional policy of encouraging tribal self-sufficiency and economic development.
The Supreme Court has indicated that state interests are not of great weight in circumstances like those before us. This is not a case involving off-reservation activities, see Mescalero Apache Tribe v. Jones,
Furthermore, the threshold question whether the State has authority to regulate Indian bingo is a matter of federal law. See Colville,
The question of jurisdiction, in the sense of the State’s authority to regulate, is central to the State’s case because the Tribes concede in this federal litigation that if State laws apply, the Tribes’ games do not comply with them. Stipulations, I, # 4. State courts are, of course, competent to decide such jurisdictional questions, but the fact that this central issue is not one of state law indicates that the importance of the State’s interest in the state litigation is minimal. Where, as in this case, a state court is asked to decide issues of federal law in an area in which federal interests predominate, the State’s interest in the litigation is in our view not important enough to warrant Younger abstention. Nor would resolution of these issues in state court prevent conflict between the interests of the Tribes, protected by federal law, and the interests of the State. That conflict is inevitable. Because abstention would not mitigate this conflict, the proper forum to resolve it is federal court. Cf. United States v. Composite Bd. of Medical Examiners,
B. Sovereign Immunity
The relative insignificance of Oklahoma’s interest in this case is further demonstrated by the lack of jurisdiction in the state court to hear the suit against the Tribes. As the analysis set out below demonstrates, the Tribes’ sovereign immunity shields them from such suits. Sovereign immunity is a jurisdictional question, see Puyallup Tribe,
It is a fundamental principle of Indian law that Indian tribes are sovereign entities. As dependent sovereigns, they retain “attributes of sovereignty over both their members and their territory,” United States v. Mazurie,
The Tribes have vigorously argued the issue of sovereign immunity at every stage of this litigation. The State does not contend that the Quapaw Tribe has in any way given its consent to suit against it, nor does it argue that Congress has abrogated the Tribes’ sovereign immunity.
The state courts thus lack jurisdiction to hear the State’s case against the Tribes. The federal nature of the law and of the issues to be decided, combined with this lack of state jurisdiction, reduce the State’s interest in this litigation to the vanishing point. Cf. Champion Int’l Co. v. Brown,
III.
THE PRELIMINARY INJUNCTION
The grant of a preliminary injunction is within the sound discretion of the district court. See Lundgrin v. Claytor,
The State does not deny that the conditions for a preliminary injunction were satisfied below, and the record contains sufficient evidence to support the issuance of the injunction. Plaintiffs not only have a fair ground for litigation, but are likely to prevail on the merits in light of Cabazon,
Notes
. The district court found that the Younger conditions were met, but declined to abstain on the grounds that extraordinary circumstances made abstention improper. On appeal, the parties vigorously dispute and defend this conclusion. Because we hold that the Younger abstention conditions have not been satisfied, we need not decide whether extraordinary circumstances are present.
. We held in Indian Country, U.S.A. that Oklahoma’s disclaimer is one both of proprietary and of governmental authority. See Indian Country, U.S.A.,
The State, in this appeal, goes still further than the Oklahoma Supreme Court. The State claims not only that Oklahoma has the relevant authority to regulate the Tribes, but also that the Tribes are subject without limit to the jurisdiction of Oklahoma’s courts. In support of this argument, the State recites a history of the exercise of Oklahoma jurisdiction over Indians previous to and immediately after statehood. See Brief of Appellant State of Oklahoma at 13-16. It is clear, however, that only federal and tribal courts existed prior to statehood, see Seneca-Cayuga I,
. On October 17, 1988, Congress enacted the Indian Gaming Regulatory Act, Pub.L. No. 100-497, 102 Stat. 2467 (to be codified at 25 U.S.C. §§ 2701-2721). This Act implements Congressional policy by providing "a statutory basis for the operation of gaming by Indian tribes as a means of promoting tribal economic development, self-sufficiency, and strong tribal governments.” Id. at Sec. 3(1) (to be codified at 25 U.S.C. § 2702(1)).
. Whether the land in question is Indian Country was an issue in the state litigation. The Oklahoma Supreme Court held that the land is Indian Country, see Seneca-Cayuga I,
. The State’s interest in preventing organized crime has also been undermined by passage of the Indian Gaming Regulatory Act, see supra note 3, one purpose of which is to shield Indian gaming from organized crime and other corrupting influences. It is apparent from this Act that the federal government intends to regulate this matter.
. But see Dry Creek Lodge, Inc. v. Arapahoe & Shoshone Tribes,
. Current federal policy is to strengthen tribal sovereignty. See Indian Reorganization Act of 1934, 25 U.S.C. §§ 461-479 (1982 & Supp. IV 1986); New Mexico v. Mescalero Apache Tribe,
. The State’s brief asserts that there are no barriers to state assertion of jurisdiction over the Tribes on the ground that the State has had jurisdiction over them since statehood on the basis of "prior existing jurisdiction.” Brief of Appellant State of Oklahoma at 13-16; see also Seneca-Cayuga I,
. Sections 16 and 17 of the Indian Reorganization Act, 25 U.S.C. § 476, 477 (1982), authorize tribes to organize and adopt a constitution and a corporate charter. The corporate charters usually include a “sue and be sued” clause to enable the tribes to engage in commercial activity as corporations without losing their sovereign immunity as tribes. This court has held that the presence of such a clause in a tribal corporate charter does not waive the tribe’s immunity as a tribe. See Ramey Constr. Co.,
. Section 473 of the Indian Reorganization Act provides that sections 476 and 477 do not apply to the Seneca tribe of Oklahoma. The Seneca-Cayuga Tribe organized instead under section 3 of the Oklahoma Indian Welfare Act, 25 U.S.C. §§ 501-510 (1982). We express no opinion as to the effect of this distinction.
