Doug McMillon has been CEO of Walmart for 12 years and worked at the retail behemoth for over three decades. He led the company through a time of rapid growth and significant changes as it adapted to a digital world. He sat down with WSJ ahead of his last day to discuss his strategy at Walmart, why Warren Buffett hurt his feelings, how involved CEOs should be in politics and more. Chapters: 0:00 McMillon’s start at Walmart 1:05 Walmart changes since McMillon took over 1:52 Winning food e-