Sen. Mitch McConnell said Thursday he will lead a subcommittee overseeing defense spending as he carves out new roles once he relinquishes his long-running post as Senate Republican leader. The Kentucky Republican revealed he will assume the chairmanship of the Senate Appropriations Subcommittee on Defense. The role dovetails with his constant message that America needs a bulked-up military to deter threats from adversaries such as Russia, Iran and China. The transition comes as McConnell is