Congress

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…judge Saigon's legitimacy by its ability to resist Northern aggression while maintaining the niceties of U.S.-style democracy, doves held America's ally to rather a high standard. Given that most Americans supported the war effort and continued to do so even into the Nixon years, the doves' ultimate triumph rests in no small part on the errors of their opponents. Lyndon Johnson's failure was one of imagination; Richard Nixon's was one of political misjudgment.