NYT:

A Senate committee on Wednesday closed a two-year investigation with unanimous agreement that mismanagement at the Internal Revenue Service led it to improperly target conservative groups seeking tax-exempt status. But a report by the panel did not suggest that any laws were broken, and Republicans and Democrats were divided over whether White House politics was behind the problems….

Mr. Hatch said that the “personal politics of I.R.S. employees” like Ms. Lerner affected “how the I.R.S. conducted its business.” But committee Democrats said in the report that beyond “merely anecdotal evidence that she was a Democrat,” nothing showed that Ms. Lerner “allowed her political beliefs to affect how she carried out her duties as a manager.”

The report said that appreciably more conservative-leaning groups than left-leaning ones experienced multiyear delays and sometimes intrusive auditing of their applications. Democrats attributed that to the fact that more conservative groups were seeking tax-exempt status from 2010 to 2013. The terms that were red flags to monitors also included “progressive” and “Acorn.”

You can find the Senate Finance Committee report at this link.

UPDATE: From the release:

A table of contents for the appendix can be found here. The appendicies can be found here and here.

A timeline can be found here.

Additional views from Chairman Hatch can be found here. A summary can be found here.

Additional views from Ranking Member Wyden can be found here. A summary can be found here.