Since the Five Eyes are officially allies, it is arguable - but definitely sedition.
Personally, I think the Uranium One conspiracy was more likely treasonous, and inherently tied to the sedition.
We could split hairs on whether the 5-eyes as "official" allies does not make it Treason. I say it is Treason, because they are foreign powers who our domestic Traitors conspired with to overthrow a duly elected President who received over 61 million votes.
That makes our 'allies' enemies, in that sense.