I.R.S. Commissioner, Demonized by Conservatives, Leaves on His Terms

John A. Koskinen, who took over an agency in turmoil and was threatened with impeachment by conservative lawmakers, called his survival to the end of his term “its own reward.”

Justice Department Settles With Tea Party Groups After I.R.S. Scrutiny

The government will pay millions of dollars in one settlement with hundreds of conservative groups and admit wrongdoing, though pay no damages, in another.

In Targeting Political Groups, I.R.S. Crossed Party Lines

A federal watchdog investigating the Internal Revenue Service’s targeting of conservative political groups said the agency also scrutinized liberal organizations.