One of them just leans toward him and babbles emotionally, one of them leads with "You're embarrassing yourself, your party, and your country", and the other one says "I don't believe that you really believe what you're saying" and when he says no I do, she repeats "I don't believe that you do".
Regardless of who you think is right about the topic at hand, it is utterly pathetic that grown adults think that any of the above constitutes anything other than petty insults, much less anything resembling a rational argument. They sound like teenagers.