this phone call? >> reporter: well, john, we know tomorrow morning this phone call is set to take place between president biden and vladimir putin, and notably a white house official telling us tonight initially the kremlin suggested the phone call take place on monday. but the white house countered with saturday, so that's why the phone call is now happening tomorrow. this certainly seems to suggest the u.s.' perspective is that they would prefer the phone call happy sooner rather than later, and it really does show that despite all of this going on and the dire warnings we heard from jake sullivan today, that the u.s. is still trying to go the diplomacy route, but i think it is very much worth emphasizing to our viewers when president biden and his top advisers have in the past talked about diplomacy with vladimir putin, they've essentially said, look, this is a very unpredictable person. this was not someone whose mind we're even trying to pretend to read, so this is a going to be an interesting dynamic, that yes