It’s not so much that they have been wrong in the past but that their ignorant ill-will is never ending. They will get him if they can. In the meantime, there are the mid-term elections next Tuesday in the US – which will be our Wednesday morning. He will be president no matter what happens the day after, but even the House going Democrat will make things much more difficult even if the Senate shifts towards the Republicans which is likely. Alas, in the House, the polls show a strong likelihood that the Dems will win, but it is still a toss up. 435 separate constituencies with everything under the sun a potential issue. On another note, this was PDT in Pittsburgh visiting a hospital after the mass murder of Jews in a synagogue.
I am not sure he ever plays politics although he is very good at what he does. He is the most genuine person I have ever seen reach high office in my life.
AND LET ME ADD THIS: From MH in the comments:
And while I am at a 50-50 in thinking about what will happen in the election for the House, I am definitely not tired of winning. If the Republicans take the House again, I can live with that!
NOT TO FORGET:
Law of Markets 
Though I generally subscribe to a healthy dose of Disraelian scepticism and cynicism when it comes to politicians, my admiration goes out to President Trump, who does seem genuine and unrehearsed.