Vermont Sen. Bernie Sanders’ primary campaign was undermined by supposedly neutral party officials, according to a document snatched from Democratic National Committee by the hacker who calls himself “Guccifer 2.0.” The document shows that Clinton and the DNC have been working in together against Sanders from at least the spring of 2015. The document, dated May 26, 2015, shows that the DNC had already chosen Clinton as the party’s expected nominee and was going to work with reporters from mainstream outlets to downplay Clinton’s negatives and to highlight her positives throughout the course of the primary. The document was created...