Not sure which thread to put this or if someone else has pointed it out before now, but it has to do with "When did the illegal spying on Trump & associates begin?"

This shows that, at least, the US Treasury was being used as as illegal spying bypass of the regular Intelligence Community's efforts to conduct spying operations without Just Cause, even as far back as December 2015.

At Clash Daily-dot-com – /2020/05/whistleblower-treasury-dept-spied-on-flynn-manafort-and-trump-family-from-2015/ as author Wes Walker subsequently cites from the Ohio Star's exclusive scoop.