California's beleaguered Governor Gray Davis, could be facing a new threat to his job, as Hollywood action star Arnold Schwarzenegger looks poised to muscle in on a bid to end his leadership. As a drive to force early elections to end Davis' mandate just five months after he began his second term gathers momentum, the "Terminator" actor is emerging as a serious candidate to replace him, analysts said. "The effort to recall the governor has suddenly got very serious and Davis and the Democrats are now treating it as such," said University of Southern California political expert Sherry Bebitch Jeffe....