The single minded obsession of Schiff's line of questioning during Prince's testimony, is with the benefit of hindsight, simply staggering.
Clearly Schiff was given access to the raw SIGINT from Crossfire Hurricane et al or he was given a DS created narrative and ordered to procure statements that could be held up as evidence to support the Russia narrative (or in consolation a lying to congress charge which could then be leveraged by Special Counsel's Office for false testimony against Trump)
Schiff repeatedly twisted every word uttered by Prince to fit a very specific narrative that Prince was an off the books rep of the Trump Admin meeting with a Russian asset.
1) DS/ Obama spies on Trump et al
2) DS/Obama authors a historical fiction based on mundane details captured while spying on Trump et al
3) DS/Obama leaks just enough of the information gleaned from spying on Trump et al to allow for a NYT, WaPo, etc story to put said spying derived information into the public domain
4) Upon being "informed by investigative journalism in the public domain" Rep Schiff exercising his congressional oversight powers interviews subjects, such as Prince and where the interview was the product of significant research and strategy on how to best support the DS/Obama historical fiction narrative
much respect to Prince…beast mode for calling out the whole game (SIGINT leaks) right to Schiff's face