If you had to choose someone to create utter chaos in western politics, Drumbaldore was the ideal candidate. I mean, if you were going to manipulate election results.
He represents everything ugly about capitalism -- mendacious business practices, greed, environmental pillaging, cronyism. . .he is easily manipulated, unread, xenophobic, and has the attention span of a fruit fly. He is inexperienced, yet confident and arrogant so he doesn't admit his shortcomings. He is unteachable.
In short, Drumpf is the quintessential example of the Ugly American, the poster child for what so many see as the worst qualities of the US.
If you had to choose anyone to do this, Drumpf is the obvious choice. It is like someone sat back three years ago and said, who could we promote that would be the worst president ever, but could be elected?