J.D. Vance went on television with Jake Tapper and did this wild thing called an 'interview'. Jake asked questions and J.D. answered the questions. The viewers of Jake's show were able to listen to the exchange and decide for themselves how they felt about Vance. This was totally unacceptable to Aaron Rupar. 

Rupar was very angry Jake Tapper didn't do Kamala or Tim's job and explain their policies. It's almost like they should come on television and defend their own policies. 

Good! Maybe Kamala will do a press interview.

They are used to people like Joy Reid and the ladies of 'The View' who scream and shout in Republican's faces.

In other words, they know he is smarter than them and so they quake every time he speaks because he makes so much sense.

See, you misunderstand. Rupar expects Jake to shout STUPID over and over  in Vance's face while Vance is not permitted to speak. Only then, will Rupar feel some happiness. 

It's almost like their ideas aren't easily defended and they aren't capable of convincing people to accept them. Perhaps that is why Kamala is dodging any interviews.