Trump OPENLY calling on a foreign power to help sink his opponent's candidacy is new. Candidates flirting with treason during an election is not. But at least when Nixon breached protocol, ethics, decency, and probably the law to undermine the Paris Peace Talks in 1968, he had the grace to keep it a secret.
(And P.S. I know it's not a perfect analogy. But the brimstone scent is close enough for jazz.)