"......Putin pays a severe economic cost...".

Only a blind man (or a vegetative one like Joe) would think that Putin is being hurt by sanctions. He has his own Petro, money, natural resources, non-cabal banks. If you want his stuff, and you ask nice, he'll sell it to you, rubles only please. And he's aligned with China, who has about the same advantages as Putin. Between the two of them, what do they need from the rest of the world? They are going to end up with everything if Joe insists on more sanctions.