I just realized that there is at least one way politicians can be prosecuted, because it has been done before: they can be tried, convicted, and sentenced for war crimes. Now, as we know, George W. Bush has violated the Geneva Conventions, specifically the Third Geneva Convention, which deals with the treatment of prisoners of war. Bush has made flimsy excuses as to why enemy combatants from the Iraq War are not protected by the Geneva Conventions, and he has aided and abetted their torture. Bush is therefore a war criminal, and since government officials are subject to prosecution for war crimes, Bush is subject to prosecution. QED. My next question is how to get him arrested.