With all the media and otherwise attacks on Trump, he could do much better - free publicity.
If you look at how he thrives on FREE publicity (now given he has popular support from a section of the voting population in the USA too), you’ll know he will do his utmost in this election.
Additionally, he can swing to the left and right of Hillary, because Hills is fairly established in her trackrecord in political views & actions.
No one has ever seen Trump in action in politics or in government. Trump is the wild-card, and he will play all cards to his advantage.
If he becomes POTUS, he will cool down thereafter, and change accordingly - he is a chameleon like Obama. Then again, after all, he is nothing if not a businessman and knows what’s good for him. And, it’s all about HIM, for HIM.
It’s all about AMERICA with him. Must be miserable to be such a cynic.