We're far enough along in the Republican primary process -- though not a single vote has been cast -- that the field has winnowed down to a small number, and we can begin to project how each of them might win the nomination. I see this is as three-man race right now: Donald Trump, Ted Cruz, and Marco Rubio. Why? Because for everyone else, the path to the nomination begins with "and then a miracle occurs." Well, maybe not a miracle. But they're basically waiting for some spectacular and unexpected change of events that will break their way and suddenly...