I appreciate the fact that the Right Wing media is having a field day with this, but is doing so by spreading mis-information. They have you believe that people were targeted, harassed, audited or otherwise denied their rights. None of this happened. In fact, no taxpayers were harmed in the making of this "scandal" No one was denied the tax exempt status sought. The default position of a 501(c)(4) application is that you get the tax exempt status unless the IRS takes it away. In no case did the IRS deny this status.
There is NO impeachable offense here. This is just wishful thinking on the part of those that did not vote for Obama. Why do Republicans feel that impeachment is a part of the election process? They have trivialized it to the point of making a mockery of our Constitution.
Settle down and enjoy the ride. You get another shot in 2016.... or more likely 2020.