Nah, that would only use up a third of the ammo, unless they know they are really bad shots ... but wholesale executions of Americans would achieve one of the long standing goals of the American left - US population reduction - save the environment and all.
What stinks is not so much their purchases, but their refusal to answer why to Congress.
Obviously, there is some planned ‘crisis’ coming which either by itself or has the potential to become violent ...
I would suspect that the ‘crisis’ will variously revolve around immigration, gun confiscation, elimination of all or part of the Constitution - but specifically the Twenty-second Amendment allowing Our King to remain in office indefinitely.
All that President Hussein has to do is seize upon some crisis or other, even a manufactured one, then declare martial law, and the consitution, the Bill of Rights, and everything even resembling democracy goes right out the window.
And then, yes, he’d be president for life, as long as he could keep milking his “crisis.”
It’s actually an old, old story, and Hussein wouldn’t be the first chief executive to seize power in such a way.