Question: Why did the U.S. Supreme Court determine that the line-item veto is unconstitutional? Question options: The U.S. Supreme Court has determined that the line-item veto is unconstitutional because it allows the president to issue executive orders without an opportunity for the courts to review the orders. The U.S. Supreme Court has determined that the line-item veto is unconstitutional because it violates the principle of federalism, allowing the states to have too much control over federal decision-making. The line-item veto is a legislative maneuver that allows a president to exercise power over a bill by taking no action, thus effectively killing the bill without affirmatively vetoing it. The U.S. Supreme Court has held that such a maneuver is unconstitutional because it violates the Presentment Clause. The U.S. Supreme Court has determined that the line-item veto is unconstitutional because it violates the principle of the separation of powers.