It's kind of difficult to respond appropriately when you suddenly get nuked for no clear reason.
There's chaos in the Pacific region gaining massive media attention. Wouldn't it be unrealistic for a foreign enemy to not attack in this moment of weakness?
It's suicidal for someone to nuke the world's largest economy and army which also has roaming nukes that can not be hit and can attack you easily, no matter the internal situation. I do get that North Korea acquiring nukes was mentioned earlier but I don't think that changes the calculus.