[Right_in_Virginia]

Wouldn’t permission for an investigation into possible “crimes” outside the Russian investigation need to come from the Attorney General?

[Raycpa]

"If he finds evidence of a crime

So he confirms that Mueller can look for "any crimes". So how is that limiting the investigation and how is that not a fishing expedition?

I can fish past my limit but I must turn anything I catch over to the game warden?

[Architect of Avalon]

A key rule of war is minimize your opponent’s ability to hurt you.