Did you watch the entire video of the exchange?
Didn’t think so.
Most people who only watch the mainstream media weren't allowed to do so, but more importantly, their short attention spans would've prevented them from comprehending more than the 20 or so seconds served up anyway.
Keep in mind that this provided an opportunity for the media "to manage" the news:
1. Instead of focusing full attention on the Chattanooga murders, perpetrated by islamic militants, and enabled by lib politicians who disarm our "armed forces", it changes the subject so now 80% of the "news cycle" is devoted to having stern faced media morons come on and attack Trump. The dems and the GOP-e giggle like schoolgirls.
2. It also provides an opportunity for "approved candidates" like Rick Perry, whose current campaign has gone absolutely nowhere, to get airtime in a desperate attempt to gain some sort of traction.