When Walker, Texas Ranger star Chuck Norris recently backed GOP presidential challenger Mike Huckabee, the candidate was the first to express surprise. "It was unsolicited," he says of the online endorsement. Now Huckabee says he and Norris are planning their "take-down strategy . . . I think people are afraid now not to support us. I'm going to send him to their house, and he'll knock on the door."