I think he just lost the final two voters from his original base

Gov. Schwarzenegger Applauds President Obama’s Budget Proposal to Fight Global Warming Pollution

Governor Arnold Schwarzenegger today issued the following statement on President Obama’s budget proposal for the U.S. Environmental Protection Agency to begin developing a national cap-and-trade program:

“Fighting climate change is the number one environmental challenge facing this generation, and the only way to realize real reductions in our nation’s greenhouse gas emissions is through a strict cap. Establishing that cap economy-wide is also the best way to ensure America’s businesses are all competing on a level playing field.