the investigation to say. back to you. >> sara, thank you. let's bring in the panel to discuss all this. we have david gregory. political analyst. a.b. stoddard and jeffery toobin. jeffery, let's start with you. we heard president trump say if you are not gifuilty of a crime why do you need immunity? >> you have the right not to speak according to the fifth amendment. that doesn't necessarily mean you are guilty. this is a major development. michael flynn was one of the most important people in the country. national security adviser to the president is an important job. he has now taken the fifth. meaning he is demanding immunity. think about what a big deal that is. >> that means -- does that tell investigators i will not talk to you unless you give me immunity? >> that's correct.