Respondents maintain that the Labor Management Relations Act (“LMRA”) does not apply to them because the statute does not expressly abrogate tribal sovereignty. This Court, however, need not determine whether the statute abrogates sovereignty, as Respondents have waived their sovereign immunity and consented to be sued in federal court. See Okla.Tax Comm’n v. Citizen Band Potawatomi Indian Tribe of Okla., 498 U.S. 505, 509 (1991) (“Suits against Indian tribes are thus barred by sovereign immunity absent a clear waiver by the tribe or congressional abrogation.”) (emphasis added). The CBA-which, again, Respondents concede they agreed to—provides:

Contrary to Respondents’ suggestion, the United States Supreme Court’s recent decision in Michigan v. Bay Mills Indian Community, 134 S.Ct. 2024 (2014), does not compel a different result. In fact, that opinion reconfirmed that an Indian tribe may waive its sovereign immunity: “we have time and again treated the doctrine of tribal immunity as settled law and dismissed any suit against a tribe absent congressional authorization or a waiver.” 134 S.Ct. 2030–31 (internal quotation marks, brackets, and parentheses omitted); see also id. at 2035 (“[I]f a State really wants to sue a tribe for gaming outside Indian lands, the State need only bargain for a waiver of immunity.”).