I get discouraged talking strategy with people who have no clue about modern capabilities.
Russia VS US would be game over. Pakistan VS India would decimate 50-70% of World Population - but not game over.
China has a very small stockpile of missiles. Also, All of them would get shot down, while Nuclear Subs of the coast of China would destroy every population center.
Not to mention, first strike with this capability by the US could mean no war... Just absolute and total victory.
So again, per my original point. Trade will be restructured. China KNOWS this!
I'm not worried about China. I'm worried about the last days of a dictator.
Do you have a source on the "The US has had the ability to defend against an attack from North Korea since the W Bush administration." for ballistic missiles?
https://www.mda.mil/system/gmd.html
The interceptors are expensive, so there aren't very many. That's why it can defend against a country like North Korea but not China.