Not much, yet he managed to successfully turn the US around from 8 failed Bush years. Now let's compare that to your man-girl Trump: 1 'empire', multiple bankruptcies, 100's of civil lawsuits against him and doing almost literally a 'bang-up' job trashing the once white White House.
So where's the issue again... one with no business history but an otherwise successful US President; the other a lifetime of business failures and already a massive failure in D.C.  No comparison. Go sit down.