Michael Dukakis, the former Democratic Massachusetts governor who lost his 1988 White House bid to then-Vice President George H. W. Bush, is warning Joe Biden not to take polls showing him with a double-digit lead over President Trump too seriously. A recent Fox News poll has Biden, the presumptive Democratic nominee, leading Trump 50-38 nationally as concerns grow over the coronavirus pandemic, racism and unemployment. He also leads Trump by 8.8 percentage points in an average of the latest national polls compiled by Real Clear Politics. By comparison, in late July 1988, a Newsweek/Gallup poll showed Dukakis with a 55-38...