Perhaps old news to some. Declassification sheds light on rumors.
I think every POTUS should have their office bugged for posterity.
In a series of remarkable White House recordings we can hear Johnson's reaction to the news.
In one call to Senator Richard Russell he says: "We have found that our friend, the Republican nominee, our California friend, has been playing on the outskirts with our enemies and our friends both, he has been doing it through rather subterranean sources. Mrs Chennault is warning the South Vietnamese not to get pulled into this Johnson move."
He orders the Nixon campaign to be placed under FBI surveillance and demands to know if Nixon is personally involved.
When he became convinced it was being orchestrated by the Republican candidate, the president called Senator Everett Dirksen, the Republican leader in the Senate to get a message to Nixon.
The president knew what was going on, Nixon should back off and the subterfuge amounted to treason.