Steve Vladeck: The Posse Comitatus Act Meets the President's "Protective Power" [View all]

https://www.stevevladeck.com/p/159-the-posse-comitatus-act-meets

President Donald Trump’s controversial federalization of members of the California National Guard and his deployment of at least 700 active-duty Marines to Los Angeles has raised a series of novel, important, and challenging questions about the scope of the Executive Branch’s legal authorities when it comes to domestic use of the military.

On one hand, the Posse Comitatus Act of 1878 generally forbids use of federal armed forces for civilian law enforcement unless a statute specifically authorizes it. Although the Insurrection Act has long been understood to be one such statute, Trump has, quite notably, not invoked it here. On the other hand, the Executive Branch (with a bit of help from the Supreme Court) has long claimed inherent power to use military force unilaterally to “protect federal functions,” including the power to defend federal property and federal personnel from violence. Thus, perhaps the dominant question Trump’s military deployment raises is the shape of the Venn diagram created by these two opposing forces. Are they mutually exclusive? If they overlap, which one prevails? Or put more basically, where does this “protective power” end, and (generally prohibited) law enforcement begin?

In our view, there are three possible answers to this question. On the first view, the protective power can include law enforcement—and overrides the Posse Comitatus Act when it does. On the second, the protective power, as an exercise of Article II authority, cannot be understood to include any typical law enforcement activity—and so such activity is unlawful unless specifically authorized by congressional statute. On the third, the answer is somewhere in between—where the protective power does not generally authorize law enforcement activity, but does when that activity is incidental to the protection of federal property and personnel (such as arresting individuals while they are attacking a federal building).

As we explain in the discussion that follows, we think that there are strong arguments to be made in support of both the second and third options—but not the first. More to the point, we think Congress has been far more clear than is widely believed about what its view is—in a way that calls into at least some question what the Trump administration has thus far used federal military forces for in and around Los Angeles.

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