Investors are told to ignore politics. That was before Trump 2.0

Open this photo in gallery: Warren Buffett walks through the exhibit hall at Berkshire Hathaway Inc’s annual shareholder meeting in Omaha, Neb. on May 4, 2019.SCOTT MORGAN/Reuters Warren Buffett has had a few things to say over the years about how investors should factor political leadership into their decision-making. His approach boils down to one word: Don’t. “Probably half the time in my adult life, I’ve had a president other than the one I’ve voted for, but that has never taken me out of stocks,” the billionaire investor and chief executive of Berkshire Hathaway Inc. told CNBC in 2017, near…