Declassified per Executive Order 13526, Section 3.3
NND Project Number: NND 63316. By: NWD Date: 2011
TOP SECRET – Sensitive
his old acquaintance Diem was the only man for the job in Saigon. He said the issue "is not Diem as an individual but rather the program for which he stands." That program "represents genuine nationalism,...is prepared to deal effectively with corruption and...demonstrates a concern in advancing the welfare of the Vietnamese people." The Senator felt it "improbable" that any other leadership "dedicated to these principles" could be found and recommended the Government "consider an immediate suspension of all aid to Vietnam and the French Union Forces there, except that of a humanitarian nature, preliminary to a complete reappraisal of our present policies in Free Vietnam" if Diem fell.63
The Mansfield Report elated Diem (who proceeded to react with even more intransigent self-righteousness to suggestions of change), subdued the French and annoyed Paris. For those Frenchmen who favored conciliation with the Viet Minh, Mansfield's analysis proved the validity of their policy. Obviously, they said, if Diem falls the U.S. will heed Mansfield and withdraw from Vietnam. Equally obviously, they said, Diem will fall. 64 To French officials willing to back Diem the Report and Washington's endorsement of it was a violation of the Franco–American agreement to support another government if Diem fell. When Mendes-France reminded Dulles of this and spoke of the need to lay plans for "another structure of government" which both France and the US could support, Dulles was noncommittal.65, France should start "betting on Viet Minh to win war."
President Eisenhower's letter to Diem of 24 October (written August and shown to the French at that time; held up until the political situation in South Vietnam settled somewhat; finally approved for transmission at the October 22 NSC meeting) was called a direct violation of the principle of cooperative action agreed upon in September by Minister La Chambre.66 French Ambassador Bonnet told Secretary Dulles that "it was felt (the letter) had given Diem full rein without requiring of him as a preliminary condition that he should first succeed in forming a strong and stable government, even though this preliminary condition had been a part of the basis of the Washington agreements." Bonnet added that the letter might be a violation of the armistice and the Viet Minh might take advantage of it.67 Then, when Ambassador Dillon suggested to the Quai d'Orsay that French support for Diem had not been all that it might have been, La Chambre was inflamed. Not only was this a false allegation, it was a direct slur on General Ely, the government in Paris and the glory of France. M. La Chambre said he was personally convinced Diem was leading South Vietnam to disaster but would still support him:
We prefer to lose in Vietnam with the US rather than to win without them...we would rather support Diem knowing he is going to lose and thus keep Franco–US solidarity than to pick someone who could retain Vietnam for the free world if this meant breaking Franco–US solidarity.68