cnn political and national security analyst, david sanga joins us now, and he s white house correspondent for the new york times . what are the potential penalties the u.s. could use as leverage to dissuade russia from any provocation? well, it s good to be with you. they have been laying out in pretty clear terms now to the russians and through the europeans what those penalties would look like. some are financial, cutting off the biggest russian banks from the world financial system. some are technological. they would involve export barriers to sending semiconductors, and other microelectronics into russia that could be used for industrial purposes, for defense