mu >> this may not be politically correct, but i think there was a big part of this investigation that was designed to go after people. >> reporter: but committee chair republican trey gowdy strongly denies he's playing politics. >> i have told my own republican colleagues and friends, shut up talking about things that you don't know anything about it. >> was it because of a protest? or was it because of guys out for a wal one night would go ll anger and frustration palpable in hillary clinton's last testimony before congress more than two years ago. >> what difference at this point does it make? >> reporter: a moment likely still fresh in the minds of republican led committee members. >> madam secretary, you let the consulate become a death trap. >> reporter: yet after three years of investigations, thousands of pages of e-mail and hours of testimony, republicans say they still have unanswered questions. on september 11th, 2012, islamic