AP - Judge dismisses Nevada caucus challenge, in boost for Obama ... Clinton in California quotes King, tries mending relations with black voters ... Romney criticizes campaign lobbyists despite having some as advisers ... McCain proposes corporate tax break ... Thompson not ready to support economic stimulus package ... Huckabee says S.C. should decide whether to fly Confederate flag ... Edwards highlights rivals' weaknesses ... Giuliani applauds Bush for putting US on offensive against terrorism ... GOP delegates from early voting states sent to back of the room