From the IG report:

“Specifically, only first-line management approved references to the Tea Party in the BOLO listing criteria before it was implemented. As a result, inappropriate criteria remained in place for more than 18 months. Determinations Unit employees also did not consider the public perception of using politically sensitive criteria when identifying these cases. Lastly, the criteria developed showed a lack of knowledge in the Determinations Unit of what activities are allowed by I.R.C. § 501(c)(3) and I.R.C. § 501(c)(4) organizations.”