The CBS Early Show has been touting their interview with Levi Johnston, the thorn in Sarah Palin's side, this morning as his first big tell-all since his self-penned Vanity Fair article last month. But as far as we can tell, he's pretty much been running his mouth off all fall — largely about waving his wang around for Playgirl, but also about Palin and her family. The latter, and his relationship with his son that lives with them, was the big subject of his CBS interview. "If [Palin's] going to go out there and say things to me, about me, I'm going to leak some things on her. I mean that's just how it is," he told Maggie Rodriguez. He even hinted that he knew of some illegal things she'd done that he'll stop short of airing. "If I really wanted to hurt her, I could, very easily. But I'm not gonna do it. I'm not going that far." Aw, that's sweet. Except that Johnston didn't stop short of undermining Palin's self-appointed post as spokeswoman for mothers of disabled children. She'd come home from work looking for her son Trig, he said, and she'd ask, "Where's my retarded baby?" She would apparently use the term regularly to refer to the child, who has Down syndrome. "She'd say it kind of regularly. I think she was joking, but that doesn't make it right."