parties political needs. >> the democratic mistake to set expectations for the hearings so high. it will be the movie. the public will see the mo vi not the book. >> i warned everybody. when you have -- most witnesses are reluctant. if you have someone who openly says that. and you should draw down your expectation. lower expectations and there were some who had really high expectations. but i think for most people they're not surprised he didn't say much. they're surprised at the performance. repeat the question, i don't understand that. the start stop. that threw people off. in moments like this, a tense exchange. between congressman and mueller. watch this. >> which doj policy or principle set forth a legal standard that an investigation person is not exonerated if they're innocence from criminal conduct is not