Ronald Reagan came to office and had already been an experienced politician as governor of California, whose ideology and ideas, no matter how simplistic or no matter how much you may disagree with them, were fairly well-developed and fairly consistent. Donald Trump is a real-estate branding operator and a reality-show television star whose entrance into big-time politics, as a victor, as someone who will now wield tremendous power, was as shocking to him as it was to everybody else.