I think Trump has had an inside track for decades.   If you look at videos of him on Letterman and other shows they always ask him about running for President.    At that time, the thought would have been he would run as a Democrat.  His response was always the same:  he does not want to run for President, but if he feels he has to he will.  But he hopes we will get the government and President to do their job so he won’t have to run.    He didn’t run by accident; this was carefully orchestrated for a VERY long time.  He did exactly what he said he would do thirty or more years ago.