I think you fail to understand why he failed in 2017 and will fail again in 2025.
The problem has never been a wall that no one really wants. (Most of that wall will be built on private property, not government property) The wall design he came up with can be easily bypassed with $100 of tools from the Home Depot.
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As I have often said, if you want to end illegal immigration then you have to go after the white people who hire them.
That means the sweatshop owner and the farmer.
It means the rich douchebag who can't be bothered to raise his own children, so Lupe is just like a member of the family (which is why he didn't pay her taxes!)
It means the nitwit who found out his DIY Project wasn't as easy as HGTV made it look, and hired some day-laborers to finish it. (Probably at that same Home Depot they are picking up their tools to cut holes in the fence)
This will simply never happen, it would be too much of a disruption to the economy.