You know what I find amazing? This whole thing runs in a circle.
You ask a republican why its okay to assassinate evil guys? Cause the Dems did it , too !
You ask a democrat whats their justification? We gotta do something, the reps are making us so we dont lose face.
Wake up, the USA has a foreign policy of illegal wars, torture, assassination, covert and overt usage of mercenaries to get around legal issues that probably wouldnt matter anyway, pillaging of illegally invaded countries through rebuilding contracts and all sorts of other crap.
We know it, everyone knows it, but apparently for some reason a couple US citizens still want to believe that is not the case, that the behaviour of the USA on the global state is something like a backwater banana republic for almost a decade now.
Who cares if it was Bush and Cheney? I dont see them facing consequences. Who cares if you elected Obama? He isnt doing anything to take back the patriot act, he doesnt do jack about happened and he is, by and large, taking the advantages given by the ruthless politics of Bush and keeping them alive.
I think this whole "shocked, shocked !" attitude isnt just a thing of Washington, its a thing of many US citizens who really dont want to accept what the USA is, but rather pretend to still believe it has something to do with moral high ground.
You know when you can start changing things again in politics? When people stop talking about it in a constant back and forth, and not virtually every career depends on leaving skeletons in the basement buried.
As Rheokhu correctly states, it has been proven that these things dont even affect election results, so I suppose the majority are in favor of it, anyway.