As President Trump toys with declaring a state of emergency in order to be able to begin construction of his border wall, his administration is in the spotlight. The House Intelligence Committee is ramping up investigations of Trump on multiple fronts, and is collaborating with Robert Mueller's team.

What exactly constitutes a national emergency? For President Trump, it is clearly securing the U.S. southern border. But others have very different ideas, including gun violence, the opioid crisis and climate change, to name a few. This week THE CIRCUS compares and contrasts various perceived national emergencies and covers people on the front lines of each one.