Chapter 8 examines how early Cold War grand strategy reshaped the constitutional system governing war powers – and how institutional redesign in turn entrenched that strategy. Breaking from the prewar pattern of demobilization, President Truman and Congress built a permanently mobilized national security state, defined by large standing forces, sustained appropriations, and the framework created by the National Security Act. These choices gave presidents ready means of action abroad while weakening one of Congress’s traditional checks: control over whether forces existed to be used. The chapter then turns to two formative tests. In Korea, Truman’s decision to deploy major ground forces without prior authorization extended historical practice to a new scale, even as congressional funding and draft extensions complicate claims of unilateralism. At home, Truman’s attempt to seize the steel industry prompted a rare judicial rebuke, though the Supreme Court’s fractured Steel Seizure opinions expose persistent uncertainty about emergency power within the separation of powers. Finally, the chapter shows that an equally consequential precedent emerged in peacetime through debates over stationing U.S. forces in Western Europe, as forward deployments and alliance commitments blurred war and peace and normalized global readiness through budgets, basing, and treaties – often without combat.

This chapter examines presidential emergency powers and the framework for analyzing separation of powers disputes between Congress and the President. It argues that the Constitution grants no inherent authority for the President to act beyond or against statutory law in crises. Analyzing the Steel Seizure Case (1952), where the Supreme Court rejected Truman’s unauthorized steel mill seizure, it critiques Justice Jackson’s tripartite framework, particularly its vague “twilight zone” of congressional silence, as conceptually muddled. It proposes a formalist framework: presidential power is limited to executing Congress’s laws or acting within enumerated presidential authorities, but Congress and the President have some overlapping or concurrent powers. The chapter then rejects claims to emergency powers, arguing that historical examples like Lincoln’s habeas corpus suspension were extraconstitutional actions that may have been justified but were not legal, requiring public or legislative indemnity. This originalist approach, opposing functionalist expansions of an “imperial presidency,” advocates a restrained presidency faithful to the law-execution role that the Vesting and Take Care Clauses assign to the chief executive.