The Fairfax County Chamber of Commerce hosted a U.S. Senate debate between U.S. Sen. Mark Warner (D-Virginia) and Republican challenger Ed Gillespie, on Tuesday, Oct. 7 at The Capitol One headquarters in McLean. The forum was moderated by Chuck Todd, host of NBC’s “Meet the Press.” Panelists included Aaron Gilchrist and Julie Carey of NBC4 and Karen Tumulty of The Washington Post.