Did you listen to Mueller’s talk this morning?
Mueller explained WHY he was authorized to investigate whether the president obstructed justice even though he could not charge the president with a crime.
If you missed it (or didn't understand) I'll help you out.
This is where Mueller explains that DOJ regulations specifically permit the investigation of a sitting president because it is important to preserve evidence . . .
In addition . . .
Let me explain what that means, Brit.
Under the Constitution, that power resides in Congress.
Let me know if you have any other questions, Brit. I hope this was helpful.