Is it possible to reach an agreement with Russia regarding Ukraine?

According to Kurt Volker, former US Ambassador to NATO, while a ceasefire might be possible, he remains very skeptical about reaching any meaningful agreement with Russia. This skepticism stems from Russia's maximalist objectives of eliminating Ukraine as a sovereign state. Volker emphasizes that Russia's fundamental goal of undermining Ukraine's sovereignty creates an insurmountable obstacle to genuine agreement, as no party would consent to the elimination of Ukraine's status as an independent nation. This fundamental contradiction in objectives makes substantive diplomatic progress extremely challenging.