With recent tensions between Zelensky and Washington, how likely are the Saudi-hosted peace talks to yield real progress?

Well, we'll find out real soon. Zelensky has certainly made his efforts to make nice on the critical minerals deal, on apologizing to the Trump White House for a meeting that frankly he has very little to apologize for, and that certainly has helped with getting this engagement going. Also, he's not attending personally, rather, his key envoys and advisors meeting with Secretary of State Rubio and National Security Adviser Waltz. I suspect that the meetings will end up being just fine, but they are unlikely to lead to a ceasefire because what the Ukrainians are prepared to accept, the Russians are not close to accepting. So either Trump is going to have to be willing to take some time, bring it to the Russians and see that the Russians are not playing full ball, or he's going to have to throw the Ukrainians under the bus more and make greater demands that they're not prepared to accept. I don't think either of those things are likely to happen today, but that's I think, the direction of travel.