Owner-Operator Independent Drivers Association v. Department of Transportation

Issue: (1) Whether the circuit court"s ruling violated the Supremacy Clause by failing to enforce the unambiguous terms of a later-enacted statute under the last-in-time rule; (2) whether the Supremacy Clause supports a presumption that an Act of Congress should not be read to abrogate treaty provisions; and (3) whether the circuit court"s invocation of a plain statement rule in connection with a facially unambiguous statute violated the Supremacy Clause by elevating the terms of pre-existing executive agreements over conflicting and unambiguous provisions of a later-enacted statute.