"This is treason."

LBJ accuses Nixon of treason in released tapes.

Just days before the pivotal 1968 presidential election featuring Vice President Hubert Humphrey's bid to succeed him, President Lyndon Baines Johnson suspected Humphrey's Republican opponent, Richard Nixon, of political sabotage that he called treason, according to the final recordings of Johnson's presidency to be publicly released.

As Johnson tried to arrange peace talks between North and South Vietnam on the eve of the election, he and his closest advisers received information indicating that Nixon allies had asked that South Vietnam avoid peace talks until after the election, the tapes show.