So the news guy gets mad since he can't corner the Representative and starts yelling and interrupting the guest he invited to interview. UNBELIEVABLE! 
However; I did like the representatives analogy about the capacity of the magazine is to a gunman what the capacity of the fuel tank means to the drunk driver. And how when the news dude got mad and asked his very same question for the 3rd time the Rep. offered that the mentally ill killer could have brought a bomb instead.
An armed society is a polite society.