Were Ronald Reagan in office today, some Republicans would "start looking for a 'real' conservative to challenge him in a primary," Arnold Schwarzenegger wrote in an op-ed published Saturday evening. "What's important is our shared belief in the broad Republican principles of free enterprise and small government," he said in the op-ed published in the Los Angeles Times. "If we continue to fight one another without being willing to compromise, we will keep losing to big-government advocates."