The top lawyer for the House of Representatives, General Counsel Kerry Kircher, is resigning after more than five years on the job.Kircher oversaw several high-stakes legal showdowns between the House and the Obama Administration, filing a lawsuit challenging provisions in the Obamacare law and another trying to force Attorney General Eric Holder to turn over thousands of pages of records relating to the controversial gun trafficking investigation known as Operation Fast and Furious.After years of litigation, the administration essentially capitulated last month in the Fast and Furious fight, giving up on President Barack Obama's assertion of executive privilege in the case.