Obama administration authorizes killing US citizen

[glatt]

I don't see how this is any different than an undeclared war like Vietnam. I don't particularly like it, but history clearly shows that the President has the power to blow things up and do random violent shit in other countries without Congress declaring war. That's what we are talking about here. How does it matter who is being blown up?

The President isn't supposed to use the military inside the borders of the US, but once you cross that border and step outside, you are fair game.

International law may be another issue, but that only matters if somebody enforces it. Also, if Congress passes a law that says you can't do something specific, like support the Contras, you might get in trouble if you do.