my guess is that Rob just isn't taking your bait on this because if you were to use red arrows to show where the problems are (supported by statistical evidence) then your diagram is backwards. As for the ocean, that is already considered a natural barrier. Yes like walls, oceans can be crossed. I don't think anyone in DHS thinks the walls are 100% effective. The fact is that they are effective though. Effective docent mean 100%.
This map also leave out airports....but then again those have walls.
the funny thing about that picture is that not only are they going in opposite direction with no possible sense of cooperation.....both of those vehicles are (obviously) rear wheel drive. As metaphors go, this one is really good.
yes, it is, but that´s why you ended up with trump by ignoring common sense.
according to the DHS more terrorists have been arrested entering the united states from canada than mexico.
according to the DHS, the majority of terrorist suspects detained entered through airports.
according to the DHS, the majority of drugs enter the united states through normal ports of entry in trucks and cars.
and according to your own immigration service, illegal immigration is at a point close to the lowest it has been since 2010.
if trump was serious about security and this was not a vanity project, he wouldn´t have shut down the government and stopped payment to the very departments that are charged with keeping your country secure!