The Republican challenger in the 4th Congressional District has opened his campaign headquarters.  John Shaban is not seeking reelection to the state House serving Easton, Redding and Weston.  He opened the district-wide headquarters in Bridgeport this month.  Shaban is looking to unseat Democratic incumbent Jim Himes.  In choosing to locate his headquarters in the traditionally Democratic leaning city, Shaban pointed to a nonprofit organization there he founded called Giants in the Community.  It's focused on teaching underprivileged children to transfer their athletic efforts toward improving their education and life skills.