There are no NATO nuclear weapons at "Russia‘s doorstep", but there have been Russian nuclear at NATO's doorstep all the time for decades.
Not only that, but in the 1990s America had paid Ukraine to either transfer to Russia or destroy all of their nuclear weapons and related infrastructure (beginning 1994 and completed in 2002). And Ukraine used to be the third strongest nuclear power in the entire world, after America and Russia.
There are no NATO nuclear weapons at "Russia‘s doorstep", but there have been Russian nuclear at NATO's doorstep all the time for decades.
Not only that, but in the 1990s America had paid Ukraine to either transfer to Russia or destroy all of their nuclear weapons and related infrastructure (beginning 1994 and completed in 2002). And Ukraine used to be the third strongest nuclear power in the entire world, after America and Russia.