Some great words from a site the provides some of the best resources out there on the web for the current US Presidential scramble, Electoral-Vote.com:
The Republican side is tomorrow and too close to call. However, if Fred Thompson comes in 4th, it’s curtains for Fred. He’ll probably drop out immediately, saying some variant of “I didn’t really want the job anyway.” It’s not sour grapes. He never acted like somebody who wanted the job. Romney has poured tens of millions of dollars of his own money into the race. McCain, Huckabee, and Giuliani have all been campaigning like crazy, albeit in different ways. Fred’s been invisible. Lesson: Don’t run for President unless you really want to be President.