How has Trump’s rhetoric on the wall changed since his campaign?

President Trump is threatening to close the southern border if democrats don't give him money for his border wall. But what the president actually wants to build seems to be a moving target these days. NBC News Political Reporter Ali Vitali, who spent two years on the road following the Trump Campaign, has some new analysis of how the president's promises on the wall match up with what he is saying today.Dec. 28, 2018