"I'm not saying he's not rational. I think the speech, its goals [are irrational]. He thought he was going to be received with open arms, that this is the house of mother Russia in Kyiv, and he was going to be welcome. And I think he totally miscalculated," US President Joe Biden said in an exclusive interview with CNN's Jake Tapper.
See also: Putin's show of force in the skies of Ukraine distracts from signs of weakness on the ground