https://www.c-span.org/video/?447953-2/fbi-deputy-assistant-director-peter-strzok-testifies-2016-investigations&live
His lawyer must have chewed his ass about smirking snarling and scowling because his body posture and all has changed. Tone of voice is calmer, too.
Gowdy is PISSED
It puts forth evidence that can be acted upon. It also creates a public record that can be used against those who testify. that's why the Dems don't really say anything or ask questions.