Each escalated it, alittle a time.
Truman had Korea; Eisenhower initiated Vietnam.
Vietnam ~ APEX
Truman, Eisenhower, Kennedy, Johnson, Nixon, Ford and Carter.
http://history.sandiego.edu/gen/20th/coldwar0.html
If you mean Vietnam and FDR: President Franklin Delano Roosevelt; then FDR had almost Nothing to do with Vietnam. It was Presidents Harry S. Truman, Dwight D. Eisenhower, John F. Kennedy, Lydon B. Johnson, Richard M. Nixon, and Gerald R. Ford. Those are the presidents who were very much concerned with Vietnam, and the war that lasted from 1945 - 1975. The American presidents since Mr. Ford have had very little to do with Vietnam since 1975.
To state the Vietnam policy for each of the following presidents a person would need to know what the following is. When this is not included with the question the answer will not be able to be known.
The presidents were Franklin Delano Roosevelt who was succeded by vice president Harry Truman
The founding of the People's Republic of China, the Korean War, and the start of the Vietnam War
Franklin Roosevelt
truman
As of May, 2012 there have been 11 U. S. Presidents since Harry Truman.
President's Wilson (Allied intervention in Russia), Truman (Korea), Kennedy (Vietnam, Cuba), Johnson (Vietnam), Nixon (Vietnam), Ford (Mayaguez incident), and Reagan (Grenada). If one considers the U-2 incident to be a military action, you could include President Eisenhower.