Islamic Republic of Iran v. McKesson Corporation

Issue: (1) Whether the Treaty of Amity between the United States and Iran also provides a cause of action to sue the foreign sovereign in the courts of the company’s “home” country, so that respondent McKesson may sue Iran in the United States and an Iranian company may sue the United States in Iran; and (2) whether a foreign sovereign’s interpretation of its domestic law is entitled to deference, as several other appellate courts have concluded, and the court below therefore erred by failing to defer to Iran’s interpretation of Iranian law to provide a cause of action for companies doing business in Iran only in Iranian courts.