Does Nixon intentionally derailing Vietnam peace negotiations in the run up to the 1968 elections constitute treason?
Nixon campaign ... sought to block a peace treaty in what one long-term Washington insider called "activities ... beyond the bounds of justifiable political combat." [Anna Chennault] arranged the contact with South Vietnamese Ambassador Bui Diem whom Richard Nixon met in secret in July 1968 in New York.... Republicans advised Saigon to refuse participation in the talks, promising a better deal once elected.
PS. See also Nixon’s alleged treason 1968.