My son Stef made a very interesting comment about immigration. He pointed out that the UK had a big illegal immigration problem, at least according to the people who voted for Brexit. They believe it is THE problem. Yet, England is an island surrounded by ocean.  No immigrants swim across those cold waters.   A moat is much more effective than a wall. How is a wall on the southern US border going to be more effective than a moat? The answer of course is it won’t. It will be ineffective. The border wall, not climate change, is an expensive hoax.