Summary

Portrait of William O. Douglas William O. Douglas Arkansas v. Texas — Opinion of the Court

But where, as here, we are concerned with a question of Texas law in which the courts of that State necessarily 'have the final say' the only basis for our holding the suit is to ride herd on the Texas court, on the assumption that it may deny Arkansas some federal right. We ought not to entertain such a possibility in the administration of justice of one state against a sister state. Of course Arkansas will get justice in Texas, just as Texas would get justice in Arkansas.
Source: Wikisource

Portrait of William O. Douglas William O. Douglas Arkansas v. Texas — Opinion of the Court

Arkansas is in our view the real party in interest. The University of Arkansas is her agency in the educational field-a branch or department of the State.
The central question which the case tenders is whether the william Buchanan Foundation has authority to spend its funds for furtherance of this Arkansas project. That is necessarily a question of Texas law, for the Foundation gets its existence and its powers from Texas. Texas courts speak with authority on those issues. Were we to undertake to resolve the questions we might find ourselves in conflict with the courts that have the final say.
Source: Wikisource

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