This isn't going to happen because its lots bigger than what he thought it would be and there is no way in the devil's graveyard that Mexico is paying for it.
International Level: Activist / Political Participation: 35 3.5%
Thinktank,
There are way to make Mexico pay for it without having them do it voluntarily. That said, I doubt we do what it takes and I don't think we'd want to. I think we will build some form of wall though. It'll be higher in some areas and lower in others and there'll be more support structure in some areas (E.g. Cameras, ground listening sonar, UAVs, etc.) too.
This topic hasn't been mainstream for a while, but the essential fact about Trump's policy regarding immigration is this - properly vetted immigration will still continue, just no more random, undocumented people whose motives and history are unknowns or forgeries. His goal has always been to keep the country safe, yet the nay-sayers still want to remain blind.
When I hear the Trump admin talk about this wall on your southern boarder I often think about two things: The Zombie Apocalypse (The large wall they used to keep the zombies out) and whether the whole thing is metaphorical. He says "Wall" but he really means the more money spent on keeping your Mexican neighbours out.
International Level: Activist / Political Participation: 28 2.8%