The time for stating an actual crime related to Muh Russia was when Mueller was appointed... now he’ll just state the crime is obstruction of justice (aka asserting his innocence and executing his presidential duties/authority). Does not matter if Mueller can actually indict , or even if the Senate would convict on a Dem House impeachment. They’ll try to get rid of Trump any way they can and be satisfied with taking back the House and Senate to sustain the swamp until he’s gone, whether that be in 2020, 2024, or earlier.
If Mueller is investigating collusion and possible obstruction of collusion... what is the crime? In other words: Mueller would need to present to a grand jury evidence of a crime and then request testimony. What is the crime? What was done to obstruct the crime?