Sundance seems to have lost his mind.
I know, right? I do hope he's been played, and that he's been misled on the role of this investigator, William Aldenberg – who does indeed appear to be solid Swamp.
My theory is that Sundance's pessimistic conclusions are based on an op the real investigators ran on him; a feint.
Because NO ONE associated with the Durham investigation is leaking.
Neither friend nor foe.
He left with making $h!t up and compromising agents gleaned from the publicly available FBI org-chart.