Today we will sign with him, let’s say, some kind of agreement, tomorrow someone else will come to power and they won't like it - and they know how to do this, as you remember with Minsk agreements - they will throw it all away and say: "illegitimate president signed this, and I don’t know about this at all" - Belarusian leader (00:17).

Ukraine’s challenge not G.O.P; it’s math. Ukraine needs more soldiers than it can field, even with draconian conscription policies. And it needs more materiel than U.S. can provide. This reality must inform any future Ukraine policy, from further congressional aid to diplomatic course set by president - Vance admits.