Declassified tapes of President Lyndon Johnson's telephone calls provide a fresh insight into his world. Among the revelations - he caught Richard Nixon sabotaging the Vietnam peace talks... but said nothing. By the time of the election in November 1968, LBJ had evidence Nixon had sabotaged the Vietnam war peace talks - or, as he put it, that Nixon was guilty of treason and had blood on his hands". Now, for the first time, the whole story can be told. It begins in the summer of 1968. Nixon feared a breakthrough at the Paris Peace talks designed to find a negotiated settlement to the Vietnam war, and he knew this would derail his campaign. He therefore set up a clandestine back-channel involving Anna Chennault, a senior campaign adviser. At a July meeting in Nixon's New York apartment, the South Vietnamese ambassador was told Chennault represented Nixon and spoke for the campaign. If any message needed to be passed to the South Vietnamese president, Nguyen Van Thieu, it would come via Chennault. In late October 1968 there were major concessions from Hanoi which promised to allow meaningful talks to get underway in Paris - concessions that would justify Johnson calling for a complete bombing halt of North Vietnam. This was exactly what Nixon feared. Chennault was despatched to the South Vietnamese embassy with a clear message: the South Vietnamese government should withdraw from the talks, refuse to deal with Johnson, and if Nixon was elected, they would get a much better deal. So on the eve of his planned announcement of a halt to the bombing, Johnson learned the South Vietnamese were pulling out.