Mr Trump wants to build a wall to stop Mexicans coming to US. It should be mentioned that 42 percent of illegals come by plane. Now it may come as a surprise but more Mexicans are going back to Mexico  than coming into the US. Why? Because of the many jobs being created by US companies .e.g. Auto jobs. Now if those jobs start to diminish, guess what may happen , Mexicans start entering the US illegally again.