In this timely and important contribution to the debate over the status of the 1972 ABM Treaty, Associate Director of the Center for National Security Law Robert F. Turner analyzes the often-neglected constitutional issues surrounding the Treaty. Is the ABM Treaty still in force and, if so, with whom? Is the ABM Treaty, as modified by the 1997 MOU, substantially the same agreement as negotiated in 1972? Must the Treaty (or the MOU) be submitted to the United States Senate for approval? Professor Turner addresses these and other pressing questions.