I always love it when Google changes their basic logo to commemorate holidays and special days. Thanksgiving has meant a riff on a turkey sitting on a sofa, Edvard Munch's birthday warranted a version of his Scream painting, and so on (check out the archive of special Google logos here).

So naturally I looked for the candidates' take on this webby tradition, but most of them are too serious to acknowledge Halloween at all. Trick, or treat?

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