predecessors on north korea and was pretty tough still on his -- in his analysis of -- and threats for north korea. i don't see where the red line is, the red line keeps moving a little bit this week. am i wrong? >> it's not clear what the red line is for president trump. it's not clear that there's a thought-through strategy other than being bellicose and issuing threats. so that becomes a problem. you don't know what exactly it will be that north korea does that triggers some kind of military response. and that is creating jitters all over washington. >> tuesday he said if they continued to threaten, i will act. yesterday he said if they attack guam, i will act. the secretary of defense saying we are ready, we have all the resources ready, but we're on a diplomatic track. the secretary of state saying we are engaging everybody, the president meeting with nikki haley today. they seem to be doing everything and saying everything at once. as a historian, as a guy who studies politics, is this a --