And Mexico won't just sit there and take it. The Mexican army is a modern, well equipped army and has plenty of combat experience within Mexico, what with having to fight the cartels with their CIA tactics and American made weapons. Mexico can also develop a nuclear weapon with ease but deliberately chooses not to as policy.

Not saying Mexico would recapture all the shit the US stole or that it wouldn't be a horrible blow to Mexico, but if people think it'd be the gulf war again they need to check what happened when the US invaded Afghanistan.

The US would lose its biggest trading partner and the BRICS sphere would likely immediately gain the second biggest manufacturing economy in all of America.