A Promised Land —the first volume, at least—doesn't officially come out until November 17. But we're already getting some clues to what the 44th President of the United States will be talking about thanks to a new excerpt obtained by .
Of course, his wife, is a major figure, and in the excerpt Obama opens up about how the presidency affected his marriage. "And yet, despite success and popularity, I continued to sense an undercurrent of tension in her, subtle but constant, like the faint thrum of a hidden machine," he .
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