https://thehill.com/opinion/judiciary/450481-20-questions-for-robert-mueller
The “American Sphinx” will be called to Congress on July 17 to provide answers to our most intriguing questions. Special counsel Robert Mueller spoke only briefly about his Trump-Russia report on May 29 and made clear that he was appointed to ask, not to answer, questions. He said “the report is my testimony” and added: “I hope and expect this will be the only time I speak to you in this manner.”
Sphinxes, of course, are not accustomed to answering questions. And speaking to a sphinx is a precarious practice since, according to mythology, you would be devoured if you got her answers wrong. Of course, Mueller may be aware that, when a sphinx is outsmarted, it is the end of the sphinx. In mythology, the Sphinx threw herself from a great height.
When Mueller ascends Capitol Hill, the question is whether he will take a pass or a header from that great height. If he sticks with his earlier position, he will do little but repeat findings from the report. If, however, Congress truly wants to question this sphinx, here are 20 questions to ask. Most concern the process or the law that should not be subject to any privilege or confidentiality claims as a basis for refusing to answer.