Here's a prescient clip from Sally Yates' nomination (March 2014). Reality certainly loves irony because the Senator asking the question was Jeff Sessions.
I made a quick and dirty transcription of the interesting bits, but I encourage you to view the whole thing[1].
Sen. Jeff Sessions: Do you think the Attorney General has a duty to say no to the president when asked to do something that is improper? ...
Sally Yates: I believe the AG and the deputy AG have an obligation to follow the law and the constitution, and to give their independent legal advice to the president
I made a quick and dirty transcription of the interesting bits, but I encourage you to view the whole thing[1].
Sen. Jeff Sessions: Do you think the Attorney General has a duty to say no to the president when asked to do something that is improper? ...
Sally Yates: I believe the AG and the deputy AG have an obligation to follow the law and the constitution, and to give their independent legal advice to the president
1. https://youtu.be/sXDt3WA07zc