Putin and Biden are negotiating over the heads of the Europeans. That doesn't have to be any harm for the EU.
If it were in his power, Vladimir Putin would turn the clock back in history to 1991. He saw the dissolution of the Soviet Union thirty years ago as a humiliation. For him it was the fall of an empire in which Russia found greatness and security. He never got over this shame.
That is why he intervened in 2008 in Georgia, which had turned to the west. That is why he annexed Crimea in 2014 and has been supporting the separatists in eastern Ukraine since they broke away from the government in Kiev.
Now Putin is again deploying troops. At no cost should Ukraine switch to the western camp. Ukrainians and Russians, for Putin they are "one people".