What Holder is describing is a model of an imperial presidency that would have made Richard Nixon blush. If the president can kill a citizen, there are a host of other powers that fall short of killing that the president might claim, including indefinite detention of citizens -- another recent controversy. Thus, by asserting the right to kill citizens without charge or judicial review, Holder has effectively made all of the Constitution's individual protections of accused persons matters of presidential discretion. These rights will be faithfully observed up to the point that the president concludes that they interfere with his view of how best to protect the country -- or his willingness to wait for "justice" to be done. And if Awlaki's fate is any indication, there will be no opportunity for much objection.
Already, the administration has successfully blocked efforts of citizens to gain review of such national security powers or orders. Not only is the list of citizens targeted with death kept secret, but the administration has insisted that courts do not play a role in the creation of or basis for such a list. Even when Awlaki's family tried to challenge Obama's kill order, the federal court declared that the cleric would have to file for himself -- a difficult task when you are on a presidential hit list. Moreover, any attorney working with Awlaki would have risked being charged with aiding a terrorist.
When the applause died down after Holder's speech, we were left with a bizarre notion of government. We have this elaborate system of courts and rights governing the prosecution and punishment of citizens. However, that entire system can be circumvented at the whim or will of the president. The president then becomes effectively the lawgiver or lifetaker for all citizens. The rest becomes a mere pretense of the rule of law.
Holder was describing the very model of government the Framers denounced in crafting both the Constitution and Bill of Rights. James Madison in particular warned that citizens should not rely on the good graces and good intentions of their leaders. He noted, "If men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary." The administration appears to have taken the quote literally as an invitation for unlimited authority for angels.
Of course, even those who hold an angelic view of Obama today may come to find the next president less divine. In the end, those guardian angels will continue to claim to be acting in the best interests of every citizen -- with the exception, of course, of those citizens killed by them.