Glenn Reynolds on a well regulated militia
In USA Today.
"Even short of revolutions and coups, the militia had a different character in ordinary law enforcement than professionals possess. If called upon to enforce an unpopular law, or to enforce the law in an oppressive or unpopular way, the militia could drag its feet and fail to perform. (In this sense, the militia was like a jury, which is free to acquit even a guilty defendant if it thinks conviction would be unjust. In fact, Yale Law Professor Akhil Amar has likened the militia to jurors with guns because, like the jury, it was an institution made up of the people, through which the government must act, and one not susceptible to the kinds of corruption besetting professional institutions)."
"But although the militia survives in vestigial form in the statute books, as a functional institution, it no longer exists. For law enforcement, the militia has been replaced by professional police, with SWAT teams, armored vehicles and Nomex coveralls; for military purposes, the militia has been replaced by the National Guard, which despite a thin patina of state control is fundamentally a federal military force."
"But this departure from the system the Framers set up has encouraged more intrusive law enforcement at home, and more military action abroad. So I'll ask you: If a well-regulated militia is necessary to the security of a free state, then are we insecure? Or unfree? Or both?"