South Carolina pols have always done "obsessive" well

Speaker John Boehner and House Republicans have decided to create a select committee to expand their investigation into the Benghazi attacks. 

Beyond that, nothing is settled. In fact, Republicans may be going on something of a mission improbable to yield new information and turn up new clues in a wide-ranging probe that has already spanned 13 hearings, 25,000 pages of documents and 50 briefings. 

There are questions about what the select committee will set out to do and what it can actually yield. And the man who will head the committee, South Carolina Republican Trey Gowdy, will be following in the footsteps of no less than eight congressional committees in the House and Senate that have investigated the September 2012 attacks on a U.S. mission in Libya.