The Russian military hackers who stole tens of thousands of sensitive Democratic Party documents in 2016 struggled to disseminate their bounty online — at least until anti-secrecy group WikiLeaks joined the effort, according to a report released Tuesday night. The report, prepared by analyzing data Facebook provided to the Senate Intelligence Committee, found that the Russian military hackers sought to publicize the documents as early as June 14 that year through a post on Facebook that said, “Check restricted documents leaked from Hillary Clinton’s presidential campaign staff,” and provided a link to an online trove.