impose those sanctions now? well, the response was, okay, it is incumbent upon the u.s. to lead on this and in jay carney's words, we are leaning on this with the initial i am poe significance of those sanctions. today he said yes the u.s. is actively considering doing more and when it was asked when, what would trigger this, he said that we're hoping for progress. we're looking forward to the talks. the four-way talks on thursday. russia, ukraine, the u.s. and the eu. so without saying so, he seemed to be saying, let's see how thursday goes and then maybe we will talk about those sanctions and see them come to fruition, jake. >> michelle kosinski at the white house, thank you so much. wolf blitzer is here with a preview of the situation room. wolf, it's a critical time in ukraine. president obama and vladimir putin had a tense conversation, we're told. and you're going to talk to somebody about what the u.s. should do next?