realistic prospect, i would say, that this army just disintegrates and putin just can't sustain it anymore. our sanctions also help in that respect. let's not forget, we have sanctioned the russian economy back to the 1930s. and that also affects the ability of the russian government to support these troops in the field for the long term. >> we have just learned, i should mention that president biden is going to speaking with xi jinping of china tomorrow, this is coming that china may be willing, hoping to help russia which has requested economic assistance. what is your reaction to that? and what should biden communicate to xi? >> he should communicate that if china wants to get involved with russia here, then china's going to be subject to the same types of blocking sanctions that have devastated the russian economy. i don't think the chinese will do that. we'll see. i know of several instances in which the chinese have refused