proportionate to what happened. the president would not be able undertake a strike without first understanding, digesting, considering, wrestling with the potential casualties. this is not what happened. the story that the president has told, the story that has continued to change. we learned yesterday planes were not in the air. we also learned yesterday that he was, in fact, briefed on potential casualties before this. by the way, it wasn t by a general as he told chuck todd yesterday. so we still don t know why trump called this operation off. there are any number of possibilities. perhaps it had something to do with casualties. i think women and children in yemen might find that ironic. perhaps it was because military officials talked him out of it. perhaps it was because tucker carlson talked him out of it. there s a concept that the simplest explanation is usually