want to bring in kaitlan collins and cnn contributor evan osnos, a staff writer at the new yorker. also the author of the new book "wildland: the making of america's fury." putin is making demands. he's only gotten a lot more aggressive since he met with president biden in geneva back in june. you and i were there. what sort of tone do you expect president biden will take in this critically important video conference call with putin tomorrow? >> i think president biden is going to bring a pretty clear warning with him because the white house is hoping that russia will de-escalate here. while they don't believe president putin has made a decision to invade ukraine that it's looking like they could. if they wanted to, president putin could given you see u.s. troops surrounding three sides of ukraine. so that will be the approach that the white house is taking. the u.s. is taking during this conversation tomorrow. but i think president biden and president putin come at this with very different agendas.