I don't know much about this situation but is Biden not describing exactly this situation here?
When presented with the video of Biden admitting to it in his own words; he pressured to fire the prosecutor, but the prosecutor wasn’t investigating Burisma.
When shown that the prosecutor was actively investigating Burisma; well he pressured to get the prosecutor fired who was investigating Burisma, but it was in the national interest!
I’m not sure if there’s another round in the typical exchange. Best to just skip to the last phase to move the conversation forward.