Sen. Robert Bennett's loss in Utah's Republican primary Saturday will have a significant impact on Senate Republican Leader Mitch McConnell. McConnell (Ky.) will lose one of his closest friends in the Senate and see his leadership team change as a result of Bennett's elimination from the Utah ballot. Colleagues and aides describe McConnell and Bennett, who served for years together on the Senate Appropriations Committee, as loyal friends. Bennett is respected in the upper chamber for his financial expertise, his persuasive level-headedness and his lack of a personal political agenda. Bennett has served for years as one of two unelected counsels to the Senate Republican leadership. He will now retire...