It’s November 6, 2016. The world is not in good shape. After years of historic lows, oil prices have rebounded—in fact, they have rebounded too well. Gas is now fast approaching $4 per gallon. High energy costs have kicked the Chinese economy into a depression, and the United States begins hemorrhaging workers. With fear spreading, the South China Sea is getting testier. What’s more, it’s been a terrible tropical-cyclone season, and southern cities are ailing. Miami and its suburbs, specifically, might take a decade to recover from Hurricane Paula. Amid this unease, some moderate, middle-aged white voters have started taking renewed interest in Donald Trump, the Republican candidate for president. To them, his once-ludicrous rhetoric is sounding more and more accurate. Their support still wouldn’t give him the popular vote, but it might let him take Ohio, Florida, and the electoral college. With the election two days away, younger and urban Americans are terrified. Some are arranging ways for their Muslim friends to leave the country. That’s the atmosphere in which two senior Facebook engineers approach Mark Zuckerberg, the company’s CEO, and tell him that this whole mess can be stopped right now. Could this happen? Would Facebook be able to single-handedly stop Donald Trump—or any other presidential candidate? It’s a question that some at Facebook appear to be asking.