if trump becomes president it will be bad because He has ZERO legislative or executive political experience. As in NONE whatsoever.  The President of the United States is a highly political position which involves both executive control and having to deal with the legislative branch. Trump would be unique among modern President's if elected because he has absolutely no experience in either of the two main skills required for the job.

He comes from a business background.  Presidents who come from a business background have traditionally and consistently performed well in the job - perhaps because they do not realise that running a country is COMPLETELY different to running a business.  For example - George W Bush came from a business background, as did Jimmy Carter and Herbert Hoover.