From last thread:

re: #113 Dr. Matt

I feel that these two sentences from Volume II of the Mueller report have not gotten anything like the attention they deserve (My retyping; my highlighting) pic.twitter.com/DfXAlmiftS

— David Frum (@davidfrum) May 3, 2019

IANAL, but, when I read that statement, I am hearing:

1) That the information that they gathered was from a Foreign Intelligence investigation rather than a Criminal investigation.

As I understand it, the purpose, rules, handling and expectations of the quality of the information associated with a Foreign Intelligence investigation are very different. And are not expected to meet the same standards as those used in a criminal investigation.

And

2) That if a criminal investigation were to occur, it is likely to uncover chargeable offenses, either in a criminal court or in an impeachment trial.