http://www.slate.com/articles/news_and_politics/politics/2015/10/the_house_benghazi_investigation_is_partisan_sham_the_gop_committee_investigating.html

Democrats have never trusted the House investigation of Benghazi. “It’s a tremendous red herring and a waste of taxpayer resources,” said House Intelligence Committee member Adam Schiff, after Speaker John Boehner announced he would establish a special committee to investigate the attack. They believed it was a farce—a glorified venue for opposition research against former Secretary of State Hillary Clinton. To that point, earlier this summer, Rep. Elijah Cummings—the ranking Democrat on the committee—accused Republicans of leaking “doctored information to the press in order to make unsubstantiated allegations against Secretary Clinton.”