happening now. a war of words between presidents biden and putin in duelling speeches about the year-long afflict in ukraine. the u.s. president in poland delivering a rallying cry for the west, declaring ukraine will never be a victory for russia and calling out putin by name. over and over again. the russian leader in moscow defending his brutal invasion and taking his nuclear threat to a new level. by suspending a key articles control treaty with washington. welcome to our viewers in the united states and around the world. i m wolf blitzer. you re in the situation room. we begin with a hiss, to face-off between presidents biden and putin as they address the world just hours apart. the two leaders sharpen the continues between them. our correspondents are bringing you global coverage as only cnn can in poland, in russia, the war zone and ukraine. first, cnn s chief white house correspondent reports from warsaw on president biden s message. ukraine will never be a victor
reporter: coming just hours after russian president vladimir putin delivered his own speech signalling russian escalation. while aides said it was not a rebuttal he thought autocrats like himself were tough and leaders of democracy were soft. and then he met the iron will of america and nations everywhere that refuse to accept it. reporter: it has become visceral discane for the president s leader. president putin s craven lust for power will fail and the ukrainian s people s love for their country will prevail. reporter: and taking apart putin s rationale. addressing the russian people directly. he could end the war with a word. it s simple. aggression stopped invading ukraine. it would end the war. if ukraine stopped defending itself against russia, it would be the end of ukraine. reporter: coming just 24 hours after a dramatic surprise