“Supposedly”?

Except that when it came to acting he did not! Funny how once again the romanticized view that is liberal mythology isn’t supported by historical fact. Can’t pull up a direct cite of the work in question, but from some people’s perspective “Roosevelt agreeing to France holding on to its Southeast Asian territory as long as it would only act as a trustee and allow Vietnam to move toward the goal of independence” is the same as “FDR supposedly wanted to make a new start in Indochina”

In the post-World War II years, the United States did not have a definite foreign policy objective toward Vietnam or
Southeast Asia. Historically, President Franklin Delano Roosevelt was a staunch opponent of colonialism. Given that
he believed that Indochina should become a protectorate of Western coalition nations and maintained through some
form of international cooperation, shortly before his death he veered from his normally rigid views and told France
that he would agree to France holding on to its Southeast Asian territory as long as it would only act as a trustee and
allow Vietnam to move toward the goal of independence.5

George McT. Kahin, Intervention: How America Became Involved in Vietnam (New York: Alfred A. Knopf, 1986), p. 4.

http://www.anselm.edu/NR/rdonlyres/5CDDE900-9FC1-4143-9B1C-D4AF85090155/6308/paper4Lamm1.pdf