The judges ordered the IRS to quickly turn over the full list of groups it targeted so that a class-action lawsuit, filed by the NorCal Tea Party Patriots, can proceed. The judges also accused the Justice Department lawyers, who are representing the IRS in the case, of acting in bad faith — compounding the initial targeting — by fighting the disclosure.

"The lawyers in the Department of Justice have a long and storied tradition of defending the nation's interests and enforcing its laws — all of them, not just selective ones — in a manner worthy of the Department's name. The conduct of the IRS's attorneys in the district court falls outside that tradition," Judge Raymond Kethledge wrote in a unanimous opinion for a three-judge panel of the Sixth Circuit Court of Appeals. "We expect that the IRS will do better going forward."