Another reason is that he's an "outsider", not to mention he claims to understand warfare better than generals and the tax code better than anyone (his accountant says he looks at the summary pages and signs, and that's about it). I've worked for government (state and city) for pretty much my entire working life, and it's a very different world. You can't walk away from budget problems, like Trump has done several times before.

There's lots of things that I don't like about Hillary, but she does have a working life's experience in government and non-profits and she knows the rules of how it works.