According to Schwarzenegger biographer Joe Mathews, the Governator was seriously considering ditching the GOP a few months ago.

Daily Beast:

A few months ago, Arnold Schwarzenegger and a few close associates discussed whether he should leave the Republican Party, according to two people familiar with the conversation. His friend Mike Bloomberg, the New York mayor, had become an independent. Maybe Schwarzenegger should, too. But the governor and his people quickly concluded that Californians already saw him as independent of the Republican Party. So what would be the point of a switch? (A spokesman for the governor declined comment.)

Arnold is far from a model politician, but he has always struck me as far too pragmatic and insufficiently insane to be a Republican. What say you?