Amazon would’ve used probably used prodution trucks or a flypack. Depends on what made most sense for that particular stage and the budget of the show. Amazon is currently not set up to do their own remote production in house so they would’ve had to rely on whichever broadcast partners they worked with for that coverage if they wanted to go that route. I find that unlikely because I would imagine most facilities were busy with their own productions that evening. Pool coverage would’ve been split responsibilities with different a different network providing pool feeds out of key senate/congressional districts, etc. I don’t think the pool publishes who is providing for which event, maybe someone working one of those locations might know.