(This inspired by comments in Scheier's cryptogram) Do all the newly electronic voting places have UPS? I doubt it. Think of the fun you could cause if you downed a few substations or poles.

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And because elections happen all at once, there would be no means of recovery. Imagine if, in the next presidential election, someone hacked the vote in New York. Would we let New York vote again in a week? Would we redo the entire national election? Would we tell New York that their votes didn't count?

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What we need are simple voting systems--paper ballots that can be counted even in a blackout.