No wonder the Bush Administration has worked so hard to distance itself from the Geneva Conventions and Republicans in general appear to loathe the very thought of the United States ever joining the International Criminal Court (ICC):
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The ICC "shall apply equally to all persons without any distinction based on official capacity. In particular, official capacity as a head of state... shall in no case exempt a person from criminal responsibility," it says. -- Article 27 of the Rome Treaty
per the AFP website.
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It's pretty much a common consensus world-wide -- and among any reality-based people within the U.S. -- that the United States has committed war crimes in pursuit of the GWoT and particularly in Iraq.
"Says who?"
Several findings definitely lead that way: