I quite agree, what we are seeing is the culmination of willfully ignoring Art 4, sec 4 of the US Constitution.
However, this IRS scandal is not that; so in order to accuse the IRS of being traitors you have to link that to this… I don't think you can.
(You'd have better luck going about it by showing the US engages in state sponsored terrorism [Fast and Furious] and the federal law barring supporting such financially combine to make paying the IRS an illegal activity.)
This probably doesn’t rise to the level of treason.
But it sure is a clear cut violation of the Hatch Act.
Using the authority of the government to affect elections is inherently corrupt.