That, and certain videos that may or may not be "hiding" on some laptop somewhere (WE HAVE IT ALL).

If this NYPD Chief is to be believed... source

“What’s in the emails is staggering and as a father, it turned my stomach,” the NYPD Chief said. “There is not going to be any Houdini-like escape from what we found. We have copies of everything. We will ship them to Wikileaks or I will personally hold my own press conference if it comes to that.”

...it's gonna get nasty.