He personally has not gone bankrupt, ever. What do people not understand about this? Businesses fail sometimes, shit happens, file chapter 11 and move on. Would everyone prefer he ran his businesses like the fed operates? Get bailouts? What? There are plenty of reasons to not like the guy but a few failed casinos and hotels out of 90 or 100 or whatever is still a very successful record.
I googled "trumps bankruptcies explained" and this was litterally the first hit:
http://www.thestreet.com/story/13286068/1/the-backstory-on-donald-trump-s-four-bankruptcies.html
Its not difficult folks