With the launch of a new House investigation, Benghazi is shaping up as a byword of this fall's midterm election and the presidential race in 2016, especially if former Secretary of State Hillary Rodham Clinton is on the ballot. The temporary U.S. diplomatic mission, created in hopes of building ties and encouraging stability and democracy, was struck by homemade bombs twice in the spring of 2012. Stevens, based in the capital city of Tripoli, chose to visit Benghazi on the anniversary of the Sept.