They can’t “win”. If by winning you mean take all their land back. But they can delay losing long enough for administration change in US maybe. EU is helping but it’s not enough, their stores are depleted. Also long term prospects in EU don’t look good for Ukraine. Many governments are shifting right.

He totally will. Of course Ukraine can choose to continue on fighting without US support. That prolly won’t be very productive. At least not in terms of recovery of land, but they can delay total loss by at least a few years if they choose this.

Meh who cares what he says now. Trump will negotiate the deal with Putin and then somebody will let Zelensky know what it is. Just like it happened for South Korea.