"It was in response to the concerns coming out of the Virginia ratification convention for the Constitution, led by Patrick Henry and George Mason, that a militia that was controlled solely by the federal government would not be there to protect the slave owners from a enslaved uprising. And it was the way that James Madison crafted that language in order to mollify the concerns coming out of Virginia and the anti-Federalists, that they would still have full control over their state militias. And those militias were used in order to quell slave revolts."