UNITED STATES - JANUARY 6: From left, Paul Clement, former United States Solicitor General, and Sen. Ron Johnson, R-Wisc., hold their news conference on Monday, Jan. 6, 2014, to announce lawsuit against the Office of Personnel Management challenging the Affordable Care Act regulation that allows congressional staff to keep their employer contributions for use toward the purchase of a health insurance plan. (Photo By Bill Clark/CQ Roll Call)