Any sure-fire proof would make the U.S. look just as guilty as Russia. Even if the U.S. knows for sure, it will look a lot worse for them if they try to release

Any sure-fire proof would make the U.S. look just as guilty as Russia. Even if the U.S. knows for sure, it will look a lot worse for them if they try to release the information. The chances that they know for sure and will release the proof are roughly 0. The problem, though, is that they released such useless information. If we trust what has been released, the "Russian hackers" were very far from elite, and far below the level of many American teenagers (let alone professionals). I'm skeptical both about the accuracy of this report and the accuracy of the claim that it was Russia. Either all/most of what's been reported is false, or Russian hacking experts weren't involved. And if the information presented is incomplete, I don't see a reason to defend the U.S., because that would mean they're doing the exact same things in Russia.