Zelenekys issue with that plan is the lack of guarantees, because of what happened the last time. He believes Russia will restrengthen faster than his country and when interest wanes, comes right back.
Trumps issue is he knows the lack of guarantees is a better deal for the US because we gain much and risk nothing. He wants to make a deal and get credit, i dont think he really cares what happens after. Maybe he does, i wish that to be the case. But i dont believe it.