I have been anxious for quite some time now when I think about what he'll try to do once he knows indubitably that the gig is up. Whatever it is, it won't be pretty.
I don't believe that our military commanders would obey an order to any nuclear strike without a damned good reason however, and I certainly don't think they would follow an order for such a strike on the US.
I certainly hope not, but so many things have happened that I wouldn't have believed could have happened, that I no longer doubt that really bad things can actually happen.
I would be shocked if an American city was nuked, but I wouldn't be THAT shocked. The Nazis wouldn't have hesitated to do such a thing, and I believe they are his role model.