Curtis Bradley may be the most accomplished scholar in the field of foreign relations law[ this book] applies his more general work on the influence of presidential and congressional practice on constitutional interpretation to the foreign relations field in a sustained, masterful way, with many illustrations of interest to scholars, judges, and practitioners working in the field. It is thoroughly excellent, and excellently thorough. -- Edward T. Swaine * Lawfare * Timely and authoritativereveals why originalists should welcome the use of historical gloss as a crucial interpretive ally. -- Julian Ku * Federalist Society * A magnificent account of how historical practice between the political branches has informed constitutional understanding. -- Michael Ramsey * Balkinization * An instant classic. As the foremost scholar in the country on the Constitution and foreign affairs, Curt Bradley has written the single best book on the subject. Historical Gloss and Foreign Affairs is a must-read for anyone interested in understanding how constitutional law develops, and it could not be timelier. -- Michael Gerhardt, University of North Carolina School of Law Outstanding. With acuity and nuance, Curt Bradley explains how presidents have come to be so mighty and how Congress can check them when it wishes. What a splendid book! -- Jean Galbraith, University of Pennsylvania Carey Law School Historical Gloss and Foreign Affairs is the definitive account of the unique ways that historical practice informs the allocation of constitutional power in foreign affairs, where constitutional text is very often a poor guide to legitimate practice. Its powerful explanation of how historical gloss informs constitutional meaning is also a vital contribution to constitutional theory more generally. -- Jack Goldsmith, Harvard Law School One of the finest books about the foreign relations law of the United States ever written. Bradley provides a masterful analysis of all the important topics and makes a convincing case about the role of historical gloss in shaping doctrine. -- Paul Stephan, University of Virginia School of Law An incisive guide to how the Constitution has accommodated dramatic shifts in the conduct of foreign affairs throughout its historyand how it might continue to do so going forward. -- Monica Hakimi, Columbia Law School