The unspoken 600-pound gorilla in the room is that the IRS did not go after Republican Party groups. There has been some noise made in that direction, but it is just that--noise. The real IRS vendetta was aimed at the Tea Party movement and not at the myriad GOP inside-the-beltway groups like American Crossroads or Americans for Job Security or any of the other interlocking GOP seen as front groups for corporate America.
As I stated elsewhere recently, The Republican Establishment is pea green with envy but also embarrassment "that the IRS did not think them worthy of harassing, or even worse, on the same side as the IRS. In other words, the IRS saw the GOP as too feckless to worry about. Either explanation is not very appealing for the national Republicans.”