Pundits have talked themselves sideways looking for a label to hang on the Donald since he entered the race last summer.
Billionaire, reality show star, but one that some never imagined is Republican Nominee.
With a major win last week and three more states up this week, Trump has had success beyond all predictions, except perhaps his own.
How could the experts have been so wrong?
Scott Thuman reports it's the media coverage that's looked more like a reality show.