My gut says that this is just more election-season talk, trying to regain some support on the left by making vague statements about giving up on prosecuting Assange. WikiLeaks is already basically dead now and all "reputable" media outlets are toeing the line on US wars, so the intimidation to would-be exposers of war crimes isn't really needed anymore. I really hope these statements aren't just empty rhetoric, but I'm not very optimistic.