Breaking it down: The two thorniest issues in the Ukraine talks up to now have been who will control what territory once the war is over, and how Ukraine can be assured that Russia won't simply resume the war at a later date.

• The 28-point Trump plan calls for Russia to gain full de facto control of Luhansk and Donetsk (together referred to as the Donbas), despite Ukraine still controlling around 14.5% of the territory there, per the latest analysis by the Institute for the Study of War.
• Despite being under Russian control, the areas in Donbas from which Ukraine would withdraw would be considered a demilitarized zone, with Russia not able to position troops there.
• In two other war-torn regions, Kherson and Zaporizhzhia, the current lines of control would mostly be frozen in place, with Russia returning some land, subject to negotiations.

Between the lines: According to the Trump plan, the U.S. and other countries would recognize Crimea and the Donbas as lawfully Russian territory but Ukraine would not be asked to.

• A Ukrainian official claimed the plan also included limitations on the size of the Ukrainian military and on its long-range weapons in return for U.S. security guarantees.
• The Ukrainian official also confirmed that the U.S. plan includes Ukrainian territorial concessions in the Donbas.
• It's unclear what the U.S. security guarantees would entail beyond a promise to defend against further Russian aggression.

Behind the scenes: One source with direct knowledge said Umerov was empowered by Zelensky to negotiate with Witkoff, and many of his comments were incorporated into the text of the 28-point plan.

• The source claimed many understandings were reached in the talks with Umerov.

• A Ukrainian official confirmed Zelensky sent Umerov to be briefed about the U.S. plan. but said it was an oral briefing and Umerov didn't receive a written proposal from Witkoff.
• The Ukrainian official denied that Zelensky's adviser accepted the terms of the plan during the meeting and claimed Ukraine objects to many of the points.
• Prior to meeting Umerov, Witkoff held extensive discussions on the plan with Russian envoy Kirill Dmitriev.