Why do some people run for office?

I still can not understand why somebody with a history of affairs and allegations of harassment would run for president. It must be sheer ego, but stupidity as well. I hope the price of his fame is worth it.

If the race comes down to Newt Gingrich, Ron Paul and Mitt Romney, how would that turn out? It's completely unpredictable. But I'll give it a shot.

My prediction:

Newt implodes. Surely it is coming.

Romney barely scrapes by with the Republican nomination.

Ron Paul runs as an independent.

Obama gets re-elected.

That's just how I see it right now.