He looked out the window. Malia was about to graduate from high school. As we made our descent to the tarmac next to Air Force One, Obama more directly conveyed how much he’d begun thinking about the end of his time in office. “I’m not certain of many things,” he said, “but I am certain of one. On my deathbed, I won’t be thinking about a bill I passed or an election I won or a speech I gave. I’ll be thinking about my daughters, and moments involving them.”