Apparently the Eared One has not heard of assymetrical state-sponsored proxies. I suggest he do some reading on Basiju, Quds, Hezbollah cells (which are active and a very clear and present danger), Aum Shinrikyo, and the like. Just because a nation has nuclear weapons does not mean that the specific nation has to use them in a conventional manner.
This act cuts the legs out from under us and unless the Senate approves it then it is non-binding and void. (Refer to the League of Nations history for a similar scenario) Non-state actors sponsored by a state are the real threat going forward. I worry about certain AORs here too. USSOUTHCOM (Venezuela), USCENTCOM (Iran), and USPACOM (China) are states which have not necessarily signed onto the NPT yet or do not possess significant amounts of deployable nuclear weapons systems to do so but that will change.
And btw, even if the US did go to DEFCON 1 and initiative an attack the response would be non-existent because of MAD. It helps that we have USAF ICBM targeting capacity as well as EMP capability but most is still classified.
This is a giant cstrfk all over.
PS: This will weaken US deterence and amplify bio/chem production. Please don't give me any "no it won't of the CWC treaty" lines in response to the latter-a lot of stuff is grey...
