This floating of lifting sanctions in exchange for a substantial nuclear-arms-reduction deal is extremely savvy global politics. I'm not surprised by it in the least.People have been running about like chickens with their heads cut off concerning Trump, but it is becoming quickly clear that my earlier assumptions were correct. Trump is lining up the negotiating cards.
However, Putin is no fool. He knows very well that the US needs Russia to reduce nuclear weapons more than the other way around. The US still has a conventional edge, even though Russia's tanks and like weaponry is more than a match for "ours" and a ground war would be fought in Eurasia, not the USA. The US Navy is the biggest difference. That's why the Russians "need" the nukes, as an insurance policy against total conventional war with the US: Heaven forbid. So, Putin will certainly be open to reductions, but he'll need an extremely strong deal on his side to make it work. For Trump's part, Trump needs gains from Russia (even if mutual) in order to lift the sanctions and make further deals, especially the type he wants (economic, business).
I disagree with Trump's characterization concerning Putin going into Syria. I think Putin was forced into Syria by Obama's moves (bad moves). I also disagree about Iran, though I think Trump has something up his sleeve concerning that and hasn't really drunk the Netanyahu/Likudnik Kool-Aid (at least not yet).