FILE PHOTO: Warren Buffett, CEO of Berkshire Hathaway Inc, tours the exhibit hall at the company's annual meeting in Omaha, Nebraska, U.S., May 5, 2018. REUTERS/Rick Wilking/File Photo
Warren Buffett, chief executive of Berkshire Hathaway and so-called 'Oracle of Omaha', was weighed down by sinking stock prices and a struggling Kraft Heinz in his annual letter to shareholders. ReuteShow more

In letter to shareholders, Warren Buffett takes a swipe at Trump


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