Mexico’s infrastructure is terribly lacking. If you strengthen those around you, then you open the door for more possibilities-especially if you consider them as potential allies. Would you rather have strong allies or weak allies? The United States is the world’s wealthiest country when you consider everything and not just liquidity. Granted our debt is super high, but look at the US’s average GDP throughout history vs other countries GDP... We have so many resources, why not extend them where they are needed most. This could be a potential way to eliminate the problems of illegal immigration as well without the use of force and racism. And by extension, increase our own wealth in the long term.