http://cryptome.org/0002/ja-conspiracies.pdf
To me the answer is that America's current "Left wing" is more in-line with the American Neoliberal world dominance agenda. Meanwhile Americas conservatives where they promote American dominance do so in public. Republican candidates debated candidly about how much they'd like the "bad guys" to get tortured. Meanwhile the DNCs favoured candidate got big donations from the defence industry and Saudi Arabia whilst talking about how important human rights are.
Wikileaks project is about attacking powerful in-groups deception of voters. All leaks help this cause by increasing the info-sec cost of conspiracy. But if the in-groups private messaging is in line with their publicly stated positions then what's there to leak?
1. We won't know unless there is a leak
2. I think the fact that there was a leak was as or more damaging to Clinton than the actual leak itself. Anecdotal... My dad: "but the emails!" Me: "what about them?" Dad: "They were hacked". Me: "what did they say?" Dad: "..."
3. So you're saying, yes there is a clear bias?
Besides, I'm pretty sure what DTjr did would qualify as eminently leakable.
The Trump administration has had plenty of leaks but they have all been published by traditional media (NY Times, CNN and so on).
"Now opposing the war, Ellsberg and his friend Anthony Russo photocopied the study in October 1969 intending to disclose it."
At best center, but since his last policies (cutting rent assistance, giving tax breaks to the rich), even the "center" image starts crumbling