And no one has yet explained how it is that they feel it to be impractical. Building the wall is simple. Negotiating for Mexico to pay for it, may be something a business expert may be able to accomplish. What was practical about flying to the moon? Now, it's history. Someday, the great Trump wall will be history. Some countries have enforced borders. Some don't. We have found out how much our porous border has cost us. I don't care who pays for the wall, I believe it to be a good idea. Will it keep ALL illegals out? Nope, but it will slow the flow. It will also make it easier for less border patrol to enforce the illegal invasion.