In January 1918, Congress began public hearings on the American war effort in World War I due to widespread reports of gross inefficiency and incompetence within the War Department. In particular, unhealthy conditions and the outbreak of disease at hastily constructed training camps led to the deaths of thousands of newly drafted soldiers and prompted a public outcry. The criticism was led by Democratic Senator George Chamberlain, and the adversarial response of Secretary of War Newton Baker and President Wilson established a cleavage between the legislative and the executive branches during the last year of World War I that carried over into the postwar period. Furthermore, it highlights tensions within the progressive movement, as the use of expanded federal authority led some progressive Democrats to emphasize loyalty to the Wilson administration, while others continued to emphasize reform and governmental transparency.