Actor Rob Lowe has agreed to help gather celebrity support for Arnold Schwarzenegger's gubernatorial campaign. Why is the former West Wing thesp, who is a liberal, endorsing a Republican? "[Schwarzenegger is] motivating and energizing people in this state that haven't been interested in politics in many, many years," Lowe tells Extra. "I know that when I'm on a set, I want to know who the director is. I don't want to have to guess. That's what Arnold will bring to this state. He's a leader."