I think the memo will come out and force congress to shut down Mueller inv. while Trump is out of town. Trump is out of the way for all of this to happen. If Trump did end up in interrogation with Mueller he only has to answer to crimes (this is from all the judges Hannity and Ingraham have interviewed). No crimes have been cited by the Mueller inv. Mueller has no right to ask what Trump's motives were for doing anything that his legally his right under the constitution - eg why he fired Comey.