have yet exhausted all options. you have spoken about setting conditions for success in advance of president trump's meeting with kim jong-un, and i am, right now, very concerned that the lack of a coherent policy in north korea could lead to a very poor meeting. and if that meeting goes poorly, some might reach the conclusion that both economic pressure and diplomatic engagement have failed. national security adviser john bolton has recently outlined the case for preventative military strikes on north korea. are there any conditions in which you would support preventat preventative strikes against north korea? >> that phrase preventative