" On November 26, 1963, President Johnson had signed National Security
Action Memorandum, 273, which was in diametrical opposition to JFK’s
NSAM 263. While Kennedy’s body was still warm in his grave when LBJ’s
signature changed future US direction in Vietnam, NSAM 273 had, incredibly
enough, actually been drafted on November 21, 1963, while Kennedy was
still alive. The memo was written by National Security Advisor McGeorge
Bundy (more on him later). Why would such a memo have been created,
when it contradicted JFK’s policy and certainly would not have been signed
by him? LBJ let it be known early on that he wanted to “win” in Vietnam,
and had no intention of following Kennedy’s plans to withdraw completely
by 1965. "

― Donald Jeffries , Hidden History: An Exposé of Modern Crimes, Conspiracies, and Cover-Ups in American Politics