Diane Carmen in the Denver Post outlines why Arnold is unpalatable to many Republicans.

He's on the record as pro-choice, pro-gay rights and pro-gun control. He's supported environmental protection regulations. He almost single-handedly passed Proposition 49, an initiative that calls for $550 million in state funds for after-school child-care programs. He married a Kennedy.

And, if all that's not lefty enough, he even trashed the impeachment of Bill Clinton. "We spent one year wasting time because there was a human failure," he told George magazine in 1999. "I was ashamed to call myself a Republican during that period."

According to Carmen:

This is why the Schwarzenegger phenomenon is so disturbing for those who have staked their careers on their unwavering conservative credentials. Because if the Terminator is the future of the party, they unquestionably represent the past.

We hope she's right.