Here is more from the Washington Post:
Russia should work to weaken the U.S. negotiating position on Ukraine by stoking tensions between the Trump administration and other countries while pushing ahead with Moscow’s efforts to dismantle the Ukrainian state, according to a document prepared for the Kremlin.
The document, written in February by an influential Moscow-based think tank close to Russia’s Federal Security Service (FSB), lays out Russia’s maximalist demands for any end to the conflict in Ukraine. It dismisses President Donald Trump’s preliminary plans for a peace deal within 100 days as “impossible to realize” and says that “a peaceful resolution of the Ukraine crisis cannot happen before 2026.”
The document also rejects any plan to dispatch peacekeepers to Ukraine, as some in Europe have proposed, and insists on recognition of Russia’s sovereignty over the Ukrainian territories it has seized. It also calls for a further carve-up through the creation of a buffer zone in Ukraine’s northeast on the border with Russian regions such as Bryansk and Belgorod, as well as a demilitarized zone in southern Ukraine near Crimea, which Russia illegally annexed in 2014. The latter would affect the Odessa region.
The document, which was obtained by a European intelligence service and reviewed by The Washington Post, highlights the challenges still facing Trump in reaching any agreement with Russia for a peace deal, now that Kyiv has endorsed Washington’s proposal for a 30-day ceasefire, appearing to bridge a divide between the two countries.
The think tank was not named by the newspaper, but it says the think tank works closely with the FSB's Fifth Service, the division that oversees operations in Ukraine.