don't ask a question you don't know the answer to. i'm sure robert mueller would do that .. >> on the question of obstruction, it's whether the president was dangling the option of a pardon to induce someone to perhaps change their testimony, not cooperate, or in some other way impede the investigation. >> this is an interesting question. obviously the question has broad power to pardon people. but it's not to extend it as a carrot for someone to behave in a particular way in an investigation. and it's note worp thi that mueller is looking into that avenue.