washington top democrats u.s. senate house representatives intelligence committees accuse russia thursday try influence nov. u.s. election via computer hack call president vladimir putin order halt base brief receive conclude russian intelligence agencies make serious concert effort influence u.s. election senator dianne feinstein representative adam schiff say unusually strongly word joint statement officials administration president barack obama say conclude russia proxies responsible hack political party organizations government publicly blame russia russia deny sponsor encourage hack activity lawmakers say russian effort intend sow doubt security u.s. election order intelligence agencies conduct action could come senior level moscow government call president putin immediately order halt activity americans stand foreign government try influence election hope americans stand together reject russian effort statement say u.s. relations russia high profile campaign nov. election white house one third senate seat house seat grab donald trump republican presidential nominee criticize democrats republicans praise putin u.s. lawmakers accuse russia seek influence u.s. election