in Fall 2016. Parts of it were accomplished during a workshop on Groups, Geometry and Dynamics in November 2017 at the International Centre for Theoretical Sciences, Bengaluru, and during a visit to Technion, Israel, in May 2018. I acknowledge the hospitality of these institutions.

[^1]: The author was supported in part by the National Science Foundation under Grant No. DMS-1440140 at the Mathematical Sciences Research Institute in Berkeley during the Fall 2016 program in Geometric Group Theory. The author is also supported by a DST JC Bose Fellowship, CEFIPRA project No. 5801-1 and a SERB grant MTR/2017/000513.
agent, the Governor. However, the Tribe urges that this suit may be maintained under the IGRA against the Governor in his official capacity under the Ex parte Young doctrine.
In Ex parte Young, 209 U.S. 123, 28 S.Ct. 441, 52 L.Ed. 714 (1908), the United States Supreme Court held that a Federal District Court could enjoin the Minnesota Attorney General's enforcement of an unconstitutional railroad rate-setting statute which criminalized violations and called for punishment through fines and imprisonment. As the Supreme Court stated:
[I]ndividuals who, as officers of the state, are clothed with some duty in regard to the enforcement of the laws of the state, and who threaten and are about to commence proceedings, either of a civil or criminal nature, to enforce against parties affected an unconstitutional act,