When President Donald Trump put 2,000 National Guard troops under his control on Saturday night and ordered them into Los Angeles, it was billed as an urgent response to quell protests. But it was also a move long in the making.

Military troops are protecting federal immigration enforcement agents as they conduct sweeps for illegal immigrants in California. On Tuesday, the Trump administration detailed the role National Guardsmen are playing to provide cover for Immigration and Customs Enforcement agents as they target illegal immigrants in Los Angeles.

But what does a state's National Guard do that local or state law enforcement can't? The National Guard is almost always called upon by a state's governor. Their job is broad, ess

Army veteran and former Secretary of State Chuck Hagel talks about the potential risks about having military troops deployed in L.A.