I Do Solemnly Swear is an in-depth analysis of the meaning and importance of U.S. President's oath of office. The oath requires the President to preserve, protect, and defend the Union by any means and then transmit it unimpaired to his successor. Pauley examines the potential political and legal ramifications of such an oath and its role as a source of presidential power. Beginning with a survey of the history of oaths from the classical world to the modern era, Pauley analyzes the President's oath within the context of American political and constitutional development. Those with scholarly interests in government, politics, or law will find this work enlightening.