Whether the United States, though not formally a party in Kiewit I, was subject to collateral estoppel based on that state-court litigation.
Holding
Yes. The United States controlled Kiewit I closely enough to be bound by the issues actually and necessarily decided there.
Reasoning
Collateral estoppel prevents relitigation of an issue that was actually and necessarily determined by a court of competent jurisdiction. The doctrine serves finality: it protects opponents from repetitive litigation, conserves judicial resources, promotes reliance on judgments, and avoids inconsistent results.
Preclusion can apply to a nonparty that assumed control of prior litigation to protect its own direct financial or proprietary interests. A person who litigates through another nominal party is not a true stranger to the earlier case and may be bound as if it had appeared on the record.
The United States had the necessary “laboring oar” in Kiewit I. It required Kiewit to sue, reviewed and approved the complaint, financed the litigation, directed the state appeal, appeared as amicus in the Montana Supreme Court, and controlled Kiewit’s attempted and then abandoned appeal to the U.S. Supreme Court. These undisputed facts established sufficient control for issue preclusion.