Like all Presidents, Trump (if elected) will be surrounded by advisers. He won't be able to do things alone. I really don't see why some people are getting all paranoia about him. He will probably be an excellent negotiator when dealing with big strong countries like China, Russia, Germany, India, Japan etc.
He'll probably make terrorist groups like ISIS, Al Qaeda, Hamas, Boko Haram, Al Shebab etc. think twice about continuing with their terror around the world, or suffer the consequences, which will be a lot more than just making their heads spin.
He'll probably create a lot more jobs than the present administration, by using strong arm tactics against companies that are constantly leaving the US to set up factories in other countries.
He'll control all the illegal immigration and give preference to legal immigration.
Hell, there's lots of stuff he can do better than the present administration, IMO