In the first place, what they are talking about happened to a Republican presidential candidate and not a president. And even if it had Russia is, to the best of my knowledge, not been designated an enemy. We are not at war with them and the President seems determined to maintain a good relationship with Putin.
What is alleged to have happened may well be criminal. It isn't treason.
Interesting and perhaps telling that your reply completely ignored the point of my comment.
If the operation continued after Trump was inaugurated,that IS treason.