these "alphabet soup" organizations after hearing complaints of inefficiency. In August 1941, after a report by Truman to the Senate on the progress of the investigative committee, Republican Senator Arthur H. Vandenberg probed Truman to name the "chief bottleneck" of all of the problems related to defense contracts. Vandenberg asked if the single point of responsibility was the White House, meaning Roosevelt, and Truman replied "yes, sir." Otherwise, the Truman Committee's reports were designed to keep the President from being blamed for cost overruns, inefficiency, and waste. Wartime work After the December 1941 attack on Pearl Harbor brought the US into direct involvement in World War II, Secretary of War Henry L. Stimson predicted that the Truman Committee would be a needless drag on war production. Under Secretary of War Robert P. Patterson agreed and called upon Roosevelt to pressure the Senate to abolish the committee. Patterson said that supplying the Truman Committee "all the information it desires" would "impair" the government's ability to respond quickly to the needs of war. Roosevelt now realized the value of the Committee; rather than striving against it, he publicly praised its progress. The Truman Committee issued a report to the Senate on January 15, 1942, detailing its achievements to date and its ongoing investigations. The Committee had begun in August 1941 to assess Roosevelt's ungainly Office of Production Management (OPM), and by January 1942, the conclusion was ready for publication. The report severely criticized the OPM: "Its mistakes of commission have been legion; and its mistakes of omission have been even greater." The dual leadership chain of command and the divided loyalties of Hillman and Knudsen were described as causing friction and wasted effort. It was a thorough indictment of poor administration. Diplomatically, Truman made certain that Roosevelt had access to an advance copy of the report. Roosevelt was thus able to save face by disbanding the OPM just prior to the release of the report and replacing both the OPM and SPAB with the War Production Board under former SPAB chief Nelson. Nelson used the committee to help his department; when the board had disagreements with the military, Nelson would leak the issue to the committee, and the resulting investigation encouraged the military to cooperate.. In May 1942 the committee was reorganized. "Contracts Under" was dropped from the name to make it the "Special Committee to Investigate the National Defense Program." Democratic