This joint resolution states that Congress opposes any effort to withdraw the United States from the North Atlantic Treaty. The President may withdraw from the North Atlantic Treaty, in accordance with its terms and pursuant to the advice and consent of the Senate, only if two-thirds of the Senators present concur, or pursuant to an Act of Congress. The Senate Legal Counsel may represent the Senate in initiating or intervening in federal judicial proceedings to oppose U.S. withdrawal from the North Atlantic Treaty and to ensure that any such withdrawal is pursuant to the advice and consent of the Senate or an Act of Congress.