This story was originally published on nationaljournal.com on June 7, 2016. Two of the most pressing questions in American politics right now are whether and how Bernie Sanders will make things difficult for Hillary Clinton in the coming weeks, and how much of a problem Donald Trump will be for Republican candidates down the ballot. Any Democrat not worried about the former or Republican not fretting about the latter is whistling past the graveyard, blinded by a serious case of denial. A lot of very smart and seasoned Democrats are deeply concerned that Sanders will not go quietly into the night after Clinton obtains enough delegates Tuesday to effectively nail down the presidential nomination. This is especially so if Sanders wins the California primary. Their nightmare is that the Vermont senator and his Sanderistas will wreck havoc at the July 25-28 Democratic convention in Philadelphia and prevent the party from coming together in a way that enhances its chances of winning the general election. The main reason that the last round of polls showed the contest between Clinton and Trump

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