Alaska enacted a statute known as “Alaska Hire.” It required employers in the state to hire qualified Alaskan residents in preference to nonresidents. Hicklin, a nonresident, sued Orbeck, the state official charged with enforcing the statute. After the Supreme Court of Alaska found the statute constitutional, Hicklin appealed to the U.S. Supreme Court, which found the statute to be in conflict with the U.S. Constitution. Which supreme court is the final authority in this case? (Hicklin v. Orbeck, 437 U.S. 518)