Let's take this setup a necessary step further.
What if Fusion GPS had unauthorized-non-security clearance access to NSA spy data while simultaneously working in an unreported agency relationship and taking money from Russia/FSB (to set up Trump and possibly others for a fall)?
The ultimate Russia collusion account. Who the hell knows what may have happened and what inside information they may have been selling Russia if this turns out to be the case? For example Russia could easily have been sold information by Fusion obtained by unfettered NSA spy data about what politicians were working against Russian interests.
Potential thick plotting here.