You know I'm following this.
Right or wrong, the world is kind of pissed at our current nominee because of his lack of experience in financial matters, so the anger isn't limited to the fact that it "must" be an American.
Also, see the Rolling Stone article about Dartmouth referenced in the thread below. Depending upon which POV you believe, this guy turned a blind eye to serious charges of hazing at Dartmouth fraternities, essentially shying away from controversy with the argument that you can't interfere with Greek (of the college variety) "culture." It's not necessarily relevant to World Bank duties but it's not necessarily a check in the "pro" column, either.