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Mark Zuckerberg’s real campaign: Save Facebook
Photo: Jeff Chiu / AP

Mark Zuckerberg started 2017 scoffing at the idea of Russia election manipulation on Facebook, and looked like he was contemplating his own possible run for the presidency.

Facebook's CEO ends 2017 a very changed man: scrambling to curtail (some of) the manipulation he now acknowledges exists, and to save the most powerful platform in human history.