TheHill reports the main concerns is the Mexican cartel, not the illegals or far-left liberals however, it was mentioned later on the article. The war on drugs and CIA involvement of the cocaine flowing from Columbia is a long standing industry used by the Democrats to gather extra money. Everyone knows TheHill is a far-left liberal news outlet but worrying about the cartels sends the wrong message that Democrats worry about criminals and drugs instead of their own citizens well-being.
Source – https://thehill.com/policy/defense/4991630-trump-military-deployment-concerns/