Actually, the Trump has had some practice building walls, too. In Scotland, he did that around his golf course, to block the sea view of residents who refused to sell their homes. Then he sent the residents the bill.

Does this sound even vaguely familiar to anyone?  

There is much more to this fascinating story, which you can read here: http://www.nytimes.com/2016/11/25/world/europe/donald-trump-scotland-wall.html