Are you saying that federal marshalls, secret service agents and FBI agents cannot take lethal action against a crazed gunman? What about killing a US citizen fighting along side Taliban fighters? A little clarity of language and thought would be helpful in discussing this issue.
No, we are not talking about law enforcement actions, we are talking about the President acting alone outside of the law deciding to take action to kill an American citizen.
Surely you can understand that this action is not only outside of our laws but way beyond Constitutional. If this occurred during a declared WAR, it would still be questionable if a decision was made by a single individual - the President!
You might as well give all powers to the President over life and death...
We are not talking about killing an American citizen during a crime or treasonous actions. We are talking about the President okaying targeting an American citizen during his drive to - say his home... As much as I would agree that he needed to be taken out, I blanch at the thought that any President could order such a hit without consequences.
If this kind of action is accepted, you will rue the day when it happens to others....not because they should be taken out, but they are simply an impediment to the President.