A leaked email from Hillary Clinton’s 2016 presidential campaign previously published by Wikileaks may take on new significance because it relates to key issues brought up in media reports about Donald Trump Jr. and a meeting with a Russian lawyer. The email in question was purportedly sent by Jesse Lehrich, a Clinton campaign foreign policy spokesman and member of the campaign’s rapid response communications team. In the correspondence, which has not yet received news media attention and remains searchable in the WikiLeaks archive, Lehrich writes that the campaign “killed a Bloomberg story” attempting to link Clinton’s opposition to the anti-Russia...