This essay considers the important but under-explored link between politics and constitutional interpretation in the realm of national security. The school of constitutional interpretation at which it looks is “presidential exclusivity,” which has gone from relative obscurity to prominence in the political branches and in public debate over the past several decades. Exclusivists deem the President to have substantial discretion under Article II of the Constitution to override statutory limits that he believes interfere with his ability to protect national security. The first question that this essay takes up is why exclusivity has come so far over the past several decades in the political branches and why it has demonstrated appeal and stay...