More than any domestic issue in 1975, foreign policy drove a wedge between the President and his conservative critics. Following the American evacuation of Saigon and the collapse of South Vietnam, these criticisms grew vociferous. On his radio show, Reagan compared the withdrawal from Saigon to the Munich Agreement and warned that it would "tempt the Soviet Union as it once tempted Hitler and the military rulers of Japan." While Ford regained some support from conservatives following the rescue of the SS Mayaguez in Cambodia, he soon drew the ire of the party's right wing with a series of foreign policy moves designed to improve relations with the Soviet Union.