I'm not sure that's actually going to help the US all that much. After decades of destabilizing Latin America, the US will likely be faced with a massive refugee crisis in the south. Meanwhile, Mexico is becoming a lot less friendly towards the US as any body who's been paying attention to the rhetoric from AMLO would know. It's even possible that Mexico may join BRICS in the near future which is an economic bloc in direct competition with the US.
Not only that, but it may face an internal refugee crises as parts of the country become unlivable. There are already major rivers and reservoirs drying up as we speak, and this will lead to millions of people being displaced. US could also face droughts that could easily lead to food shortages and even famines. The framing practices in US make this all the more likely given that they're stripping the soil.
Furthermore, the US being geographically cut off while not being self sufficient means that it's uniquely reliant on supply chains across the ocean. As these supply chains become disrupted, that will cause major economic problems.
Of course it’s speculation how exactly this will play out, but I believe Europe, Africa, India, China, Russia will all be embroiled in the “climate wars” while the US can continue to snipe from their big continent.
Seem far more likely that Africa, India, China, and Russia will help and support stabilize each other because it's in their common interest to do so.