In March 1951 secret United States intercepts of diplomatic dispatches disclosed clandestine conversations in which General MacArthur expressed confidence to the Tokyo embassies of Spain and Portugal that he would succeed in expanding the Korean War into a full-scale conflict with the Chinese Communists. When the intercepts came to the attention of President Truman, he was enraged to learn that MacArthur was not only trying to increase public support for his position on conducting the war, but had secretly informed foreign governments that he planned to initiate actions that were counter to United States policy. The President was unable to act immediately since he could not afford to reveal the existence of the intercepts and because of MacArthur's popularity with the public and political support in Congress. However, following the release on 5 April by Representative Martin of MacArthur's letter, Truman concluded he could relieve MacArthur of his commands without incurring unacceptable political damage.