Tens of thousands of unchecked persons cross the border every month. We already have walls / barriers / fences in other locations because we want to curb these crossings.

The Trump administration only need prove that border security falls under his purview (it does) and if an unchecked mass of migrants is an emergency.

We have the TSA checking US citizens because they pose a threat to national security. How can the TSA exist in a world where democrats say unchecked immigrants don't pose a risk to national security?

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