Three military branches are now without leaders as Sen. Tommy Tuberville blocks nominations
                                
                                
                                    (Newser) -
                                    Alabama Sen. Tommy Tuberville now has notched an unprecedented political hat trick of sorts: Because of the Republican senator's  hold on military nominations , the Navy, Army, and Marines are without official leaders for the first time, reports the  Military Times . The trifecta came into place Monday when Navy chief...