If we do give the Southwest back, it should be under the same conditions that we got it. All that was there were a few Spanish missions, Indian dwellings, ranches, and mines. Any businesses, infrastructure, etc. beyond this needs to be forcibly relocated or destroyed before it could legitimately “revert” back to Mexico. Let’s see how much they would want the land if it were still the barren wasteland that it was when they owned it last.
War is coming, prepare.