I have indirectly known, both POTUS Trump & Hillary Clinton for about 25 years, while living in New York.

POTUS Trump knows how to survive in the Business World.  He has now entered, into the Political World, and will be learning fast.

He knows business retaliation, and now, he knows political retaliation.

You have grossly underestimated, a person who beat the Republican Champions, in the Primary Election.  You have grossly underestimated, a person who beat Hillary Clinton in the General Election, who had a giant machine backing her.