BEVERLY HILLS, Calif. - Gov. Arnold Schwarzenegger opened his international climate change summit on Tuesday by upstaging himself with an even bigger political star - President-elect Barack Obama. Schwarzenegger, a Republican whose efforts to combat global warming in California have generated worldwide acclaim, wants to show that governments can balance environmental protection and economic growth. He hopes his summit will influence negotiations over a new climate treaty during a U.N. gathering in Poland next month. In a taped message to attendees, Obama said his...