Just rumour at this stage Kovalchuk wing of the Kremlin has directly approached Biden administration with a proposal to retain Crimea and let go the rest. Kovalchuk/Kirienko in battle with Patruchev wing for the PM in Putin's new administration. Patruchev is the ruthless FSB boss, Kovalchuk is Putins best friend and banker. Patruchev got one up so far by arresting Kovalchuk wing Deputy Defence minister Ivanov. Good if this end up dog eating dog.
