Mexico and the US can share the power generated, by the solar wall. The problem is that it would drive up costs and some people would want to destroy it, but it is something to consider. Supreme Court Justice Sonia Sotomayor makes the case; as to why, we should better protect the borders—she sees it as appropriate to put the original natives and mestizos at disadvantage. The solar array gives something to both countries. If Trump plans to build it anyway, make it useful.