"Drumpf" is his real last name (Or at least the original name of his grandfather upon immigrating to the US). The intention behind using it is to separate the man from the "Trump" name since a lot of people believe he is a good business man because that name is on the side of a bunch of giant concrete phalli, and thus a good president (Of course that ignores the fact that being a god business man would make for a terrible president, but people are idiots...).
Biting the hand that feeds IT
