At first I had reservations about giving China a pied à terre in North America, but upon reflection I realized that (1) they've already got one in contemporary California and (2) giving it to Mexico is the same as giving it to China and (3) the ChiComs would be no worse and would be more fiscally responsible than the decadent California Leftists.
If China won't take it--maybe we can give it to North Korea.
Or--here's an idea--maybe we could make a deal with Kim Jon Um (is that his name?): we give him the California Leftists (they'll go voluntarily since they think North Korea is the world's perfect place) in return for...
...uh......what can we give him to take them?
Simple. San Diego. That way, North Korea would have a border with Mexico! Then, a couple million Mexicans would migrate to Korea complete with Taco trucks and fecund uteri. A couple million Mexicans would soon be 20 million and..........they grow pot in North Korea creating a spectacular economic turnaround. And the North Korean people would benefit too; they’d still probably starve half to death but........they’d be stonned and happy because the transplanted Californians would move to legalise the Mexican pot. Now that’s a win-win!!