I think treason is the right word.
treason
n. The betrayal of allegiance toward one's own country, especially by committing hostile acts against it or aiding its enemies in committing such acts.
n. The betrayal of someone's trust or confidence.
n. A betraying; treachery; breach of faith.
Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.
That's the definition of treason according to the Constitution, which is why I'm saying it's sedition. Either way both are dependent on which area of the political spectrum you are on. I'm sure the founding fathers could be hooked up to harvest electricity as much as they are rolling in their graves.
Seditious or treasonous? Personally I think it's more likely to be seditious not treasonous. If it's truly treason then what foreign government are they assisting? I don't think either side is acting on behalf of a foreign government which is why I think it's sedition.