Yes but after a lengthy air war, the US can’t “just” sit back in British base and use B 36 to drop bombs, not when the entire war industry of the Reich would be focused on defending its air space:
Although B 36 would be *really* effective once most AA threats are eliminated.
Germany would try to build nukes when they discover the American have them, and they would discover it contrarily to what AANW assumes, it’s impossible to hide the deployment on a large scale of a weapon like the nuke. But it took 7 years of development for the soviet WITH better scientist and spies in the manhattan project, Germany would be one big crater before they can make single a nuke (although they may somehow Salvage a nuke from a crashed plane, but at this point the USA would already be deep in the bombing campaign and the Reich would only have months to lives)
I have to admit that i’m not Sure the US would go all out in an air war followed by a. Complete nuclear campaign against Germany unless Germany keeps attacking Britain and American assets, if the Germans are smart enough (which I doubt they would be) to avoid provoking the US too much I think the American leadership may not consider worth it to directly attack the Reich, especially if they can cause dozens of thousands of death in Britain with chemical attacks. Although that would also depend on how the war with japan ended, if it was an operation downfall people may be more cautious with a full scale nuclear attack and invasion/Pacification (because you’ll need to put boots on ground eventually) of Europe.
If hitler keeps sending V2 at Britain or sinking ships though? Yeah they’ll get the nukes; millions will die in Germany, but dozens of millions will survive in the occupied Eastern Europe.
Biological weapons Won’t be used by the Anglo-american unless the Nazis use them, then it’s anthrax time for Germany _ although the effectiveness of anthrax depends on the state of germany’s Infrastructure, if it is still mostly standing.i guess they can manage anthrax bombing campaign by starving the reichskommisariat even more and focusing on the essential part of the army, it’s not sustainable though._