Tom C. Clark

Tom C. Clark’s career in the Truman administration placed him on both sides of a defining constitutional question: how far presidential authority could reach when the government claimed a crisis demanded action. As attorney general, he supported a peacetime loyalty-review program and advised Harry S. Truman that a president could act to prevent a crippling strike. Later, as a Supreme Court justice, Clark joined the majority that ruled Truman’s seizure of the steel mills unconstitutional. The contrast between those episodes, and Truman’s resentment at the second, gives Clark’s appearance in the narrative its particular weight.

Attorney General and the Loyalty Program

As attorney general, Clark was among the officials who persuaded Truman that a federal employee loyalty program was necessary amid intensifying political pressure over communism. Clark acknowledged that the number of disloyal government employees was probably small, but argued that even one could pose a serious threat. J. Edgar Hoover urged broader authority to remove employees whose political views were considered suspect, while Truman worried about the power of the FBI and the danger of an oppressive investigative apparatus. The policy emerged from that conflict: the administration sought to head off accusations of softness on communism, even as Truman remained troubled by the methods and assumptions behind the campaign.

On March 21, 1947, Truman established the Federal Employees Loyalty and Security Program by executive order. The scope was extensive: every federal employee could be investigated, with FBI and House Committee on Un-American Activities files available to investigators. A finding of disloyalty could cost an employee a job on the basis of reasonable grounds for belief, although the program did not define disloyalty. Those accused could not confront the people making allegations or necessarily learn who they were or what the charges entailed. Clark’s place in the policy debate therefore connected a stated concern about potential security threats to a system that exposed government workers to serious consequences under limited procedural protections.

The program was not presented solely as a means of removing disloyal employees. Truman later described its purpose as both protecting the government workforce and shielding innocent employees from unfounded accusations. He appointed conservative Republican Seth Richardson to lead the Review Board, seeking to demonstrate that the program was not simply a partisan weapon. David Lilienthal, while conceding that some such measure might be necessary, feared that a loyal employee could be placed at the mercy of a hostile accuser. Clark’s argument for taking the threat seriously thus belonged to a broader policy response whose stated protective purpose existed alongside rules that critics saw as ominous.

A Cabinet Figure in Truman’s Political World

Clark also appeared in the administration’s internal politics over labor legislation. In June 1947, Truman vetoed the Taft-Hartley Act, which restricted union activity and imposed new requirements on labor organizations. Nearly the entire Cabinet had urged him to sign it, including John Snyder, Truman’s close friend; Clark was among the exceptions to that advice. The veto nevertheless failed to hold: Congress overrode it within days, and in the House more Democrats voted against Truman than supported him. Clark’s position placed him on the side of the veto within a divided administration, though the evidence does not identify him as its principal strategist.

A more personal glimpse of Clark’s standing came at a private birthday dinner for Truman at the F Street Club. Clark hosted about forty guests, including the President and Mrs. Truman. George C. Marshall, who rarely accepted Washington dinner invitations, gave an unusually emphatic tribute to Truman’s integrity and decisions. Clark and Snyder had offered toasts before Marshall rose to speak; Truman, visibly moved, could respond only by gesturing toward Marshall and acknowledging his wartime leadership. Clark’s role was that of host rather than the speech’s subject, but the gathering shows him among the senior figures in Truman’s Washington circle at a moment when the President’s relationship with his advisers carried both political and personal significance.

Advice on Presidential Emergency Power

Clark’s most consequential advice to Truman concerned the threatened paralysis of the national economy. When Truman considered seizing the steel mills during a labor crisis, he relied in part on a legal rationale Clark had previously offered while serving as attorney general: a president faced with a calamitous strike possessed inherent power to prevent such a stoppage. The claim supported the view that emergency conditions could justify executive action to keep essential production operating.

The advice mattered because the proposed seizure was bound to test the boundaries between presidential authority and the powers of Congress. Truman believed his responsibilities as president and commander in chief, together with the national emergency, authorized him to act. His legal advisers supported that position, and Fred M. Vinson reportedly advised him in confidence that the seizure was legally permissible. Clark’s earlier counsel thus formed part of the administration’s case for action, although the evidence does not establish that he directed the later seizure or participated in the litigation as attorney general.

The Supreme Court Ruling and Truman’s Resentment

By the time the Supreme Court considered the seizure, Clark had become one of its justices. On June 2, 1952, the Court ruled against Truman by six votes to three. Clark joined the majority, which held that the commander in chief did not possess ultimate power to take private property in order to prevent a labor dispute from stopping production. The opinion emphasized that resolving such a question belonged to the nation’s lawmakers, not military authorities. The result rejected the constitutional position that Clark had earlier helped Truman defend as attorney general.

The ruling was a humiliating defeat for Truman, especially because it came from a Court made up entirely of justices appointed by him or Franklin D. Roosevelt. Clark’s vote angered Truman for years. Truman later described his decision to place Clark on the Court as his greatest mistake as president, although the book notes that this retrospective judgment was harsher than Truman’s attitude at the time. The episode left Clark at the intersection of legal advice, executive power, and personal loyalty: a former administration lawyer could support a president’s emergency rationale in one institutional role, then join the Court in limiting that president’s authority in another.

Significance

Clark’s narrative role is defined less by a continuous personal portrait than by the changing authority of the offices he held. As attorney general, he endorsed a broad response to concerns about disloyalty and gave Truman a legal basis for acting against a potentially crippling strike. As a justice, he participated in a ruling that imposed a constitutional limit on executive action. The two episodes reveal the tension between government officials’ judgments about urgent national needs and the institutional safeguards that constrain the means used to meet them.

The steel case also turned policy disagreement into a lasting personal grievance for Truman. Clark’s vote did not merely defeat a particular seizure; it marked the point at which Truman’s former legal adviser joined a Court that denied the President’s claim of authority. In the account of the administration, Clark therefore represents both counsel within government and the independence of a court capable of rejecting the position that counsel had once supported.