LBJ, who managed to get American Troops to Vietnam with a fake crisis, had the full support of the democrat party that dominated politics at the time. He set the rules so that the U.S. could win every battle and still lose the war. Just when LBJ achieved the unthinkable on the backs of Marines after the Tet offensive and the V.C. were whipped he gave up. Instead of claiming victory and forcing the VC into capitulation and just when the U.S. needed leadership, LBJ gave up on public T.V. and gave Giap crucial capital for Chinese support and recruitment. Democrats managed to blame the whole thing on Nixon.