Well, a leak could help or hurt both sides. A leak like that seems ad hoc and spontaneous and possible from a single individual, though. Invading a country, crashing hedge funds, collecting and integrating and prosecuting Clinton crimes, and gaining control of the narrative are big, huge, stupendous planned operations. They couldn't have been done without an entire military that isn't compromised or a mob of clever apes or a clandestine army of lawyers or the richest man in the world throwing money bombs.