constitution of the united states required of me that day. [ applause ] i'm sorry, ma'am, that's actually what the constitution says. no vice president in american history ever asserted the authority that you have been convinced that i had. i want to tell you with all due respect, i said before, i said when i announced, president trump was wrong about my authority that day, and he's still wrong. >> fascinating exchange. cnn's kyung lah is in sioux city, iowa. you were there for this. how did it play out? >> reporter: it was inside the extra room, the rental room of a pizza ranch. and abby, when we stepped into the room, you could tell it felt different than all of the multiple events we'd seen the former vice president in throughout his iowa swing here. it was a bit more confrontational. there was a man wearing a trump 2024 hat. there were vocal trump supporters including that woman who asked that question. and that woman in her question was clearly blaming trump, saying that she believed that he