Lee and Melanie are hostile to Arnold's candidacy. Why would he want to return their calls? Lee Rodgers is ordinarily a cranky boor with guests he disagrees with. They can argue "public's right to know" and "journalistic imperatives" all they want, but they are hostile to Arnold's campaign. With him in constant demand, why should he go on a show where they'd try to bushwack him?
But I thought he wanted to be a unifier? He only picks battles he knows he can win, in other words. ;-)