That is theory anyway and the explanation.
Also we will still own a couple of THOUSAND nuclear warheads, our best and newest ones, even if Putin gets his wish list. I think that's a deterrent to anyone that might cobble together one backyard nuke. And we can take the savings from maintaining obsolete weapons and buy some NEW toys.
The size of our arsenal is HUGE. Reduction to 1700-2000 nukes will leave more than enough to accomplish any and all goals for their use. The next time a (large)nuclear device is used by any major power in the world will probably be the last. Either we will respond with a nuke and be ballyhooed into disarming altogether or we will find ourselves in a rather distaseful game of repetitive launches wherewith we, along with our oppponent, will wreak havoc upon the face of the earth leaving the planet uninhabitable for some time.
Needless to say, but I am definitely PRO-MDS.