The Global South cannot get nukes fast enough. The only way to deter the US is to show that it will get glassed by everyone if it tries any shit.

Luckily the US's non-existent industry can't really sustain a prolonged nuclear arms race (e.g. how slow even conventional US munitions are being built). Back in the Cold War, the USA used the nuclear arms race to waste Soviet industrial resources. Now, the Global South can flip the same strategy on the US.