25 tea party groups sue Obama administration, IRS By: Byron Tau May 29, 2013 02:11 PM EDT A conservative watchdog group filed a lawsuit Wednesday on behalf of 25 tea party groups against the Internal Revenue Service and Obama administration officials. The complaint, filed by the American Center for Law and Justice, alleges that the Obama administration overstepped its authority and violated the First and Fifth amendments to the U.S. Constitution. It’s the latest in the unfolding legal drama over the IRS’s admitted targeting of tea party groups — a scandal that has already cost the acting head of the...