RE: Its not up to him to clear Trump - its up to him to indict Trump
Actually, Mueller said that charging President Donald Trump with a crime was not an option, citing department policy that a sitting president cannot be indicted.
Here’s what he said:
Under longstanding department policy, a president cannot be charged with a federal crime while he is in office. That is unconstitutional. Charging the president with a crime was therefore not an option we could consider.
The question then becomes — if you can’t formally charge him with a crime, the least you could do is provide EVIDENCE for a legal body to charge him with a crime. Even that Mueller could not provide.