Donald Trump actually said...
We're looking at a national emergency because we have a national emergency. Just read the papers. We have a crisis at the border of drugs, of human beings being trafficked all over the world. They're coming through. And we have an absolute crisis and a criminals and gang members coming through. It is national security. It's a national emergency.
Context
Trump describes the situation at the border as a national emergency involving drugs and human trafficking.
01/06/2019