Danoff
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- Mile High City
I guess the difference between this and the wall is that at least some people in America are convinced signing up to the Paris climate agreement is a good thing but I'd be surprised if anyone in Mexico thought that their paying for the wall is a good thing.
I was more thinking that you could tell people that we need to keep the rest of the world out with a bubble over the US. Maybe it could be framed as a missile defense system, or preventing illegal aliens from getting in.