I wonder why they are “mostly unarmed.”

The National Guard has about 2,100 troops working along the U.S.-Mexico border as a caravan of thousands of migrants approach from Central America in a direct challenge to President Donald Trump’s immigration policies.

On Monday, Trump lashed out at the caravan, calling it an “assault on our country” and vowing to send as many additional troops as necessary to the border to stop them, according to USA Today.

The now estimated 7,000 migrants have reached southern Mexico. They are traveling mostly by foot on a route that originated with about 200 initial migrants seeking to escape gang violence in Honduras.

In April, Defense Secretary Jim Mattis authorized that as many as 4,000 troops could be sent to the border pending approval of participating state governors. The memo allowed for the cost of the deployment to be reimbursed through federal funds, but also limited the National Guard’s role, prohibiting guard forces from interacting with any of the migrants or taking on a law enforcement role.

If the United States military cannot protect America from this wave of invaders, then the military cannot protect America from anyone.  If the military cannot secure America’s borders, then the troops can’t secure the borders of foreign countries either. To claim otherwise is akin to claiming that while a man can’t prevent intruders from entering his home, he can be expected to protect his property by stopping intruders from intruding on other people’s property.