Isn't Trump merely being audited, rather than criminally investigated as Wikileaks are saying RE Clinton? One is a normal process, the other is not.
... if you had actually read
the article WL was blowing up from basically nothing (and was itself clickbait bullshit dredged up at this point in time precisely because it was old news idiots would froth themselves up about, again), criminal investigations are things that aren't happening. IRS's checking over things to placate yet another republican witch hunt, but it's no more than your usual charity organization audit beyond that.
Though no, trump's pretty much perpetually under civil and/or criminal investigation due to how terrible a person and businessman he is, and if he's not under any criminal ones right at this moment (mind you, he is under investigation for at the very least some of the stuff related to the assault accusations, but it's not about his tax avoidance or charity fraud and whatnot, yet) it's because sane people (i.e. not the people feeding conservative media in the US, these days) don't tar their organization with the brush of political bias in the middle of an election. That's pretty likely to change after the election's over and cooled down, assuming his legal team doesn't manage to settle outside court for the Nth+1 time.
As for wikileak's general accuracy, maybe something else they're doing is better but their twitter has been all
sorts of fucked up the last handful of months. Outright lies, massively deceptive framing, etc., so on, so forth. Particularly pretty much anything they've released about clinton, even if the material itself is authentic what they're saying about it is about as likely to be a grotesque distortion (at best) as anything. It's come up in this thread, two seconds with google with find you a nice spread of times, particularly recently, when they're just straight up lied, never mind the accusations of fabrication for some of the more recent leaks or how badly they've twisted some of the material they've released. They've been doing their damnedest to undermine themselves with everyone that's not drinking alt-right/anti-clinton swill, one way or another.