Are you sure you want to delete this post?
It is all about showmanship to his avid base who has no idea what's going on. As per this CNN article, they might not be doing much of anything on the border:
CNN, April 6, 2018: Trump's border troops may not have much to do
The National Guard are not the same as regular army troops. They have civilian day jobs, and don't know much about building roads or bridges, unless it means driving a grader down a road washed out from rains. What rains? Ha.
They certainly do not have the authority to engage in military actions. So maybe they'll sit around and play cards.
From the CN article, "President Trump continues to use every cynical political trick in the book to ignite anti-immigrant fervor," House Democratic Leader Nancy Pelosi said in a statement. "His needless militarization of the border is motivated purely by political calculation, not our national security."