Don't kid yourself. We are used to that deniability with our politicos. There's always some half truth or caveat in there that provides some cover. Obama by contrast is a blatant liar. Clinton, is a blatant liar. Trump speaks so simply that the concept doesn't really apply.
You forget that Clinton's and Obama's base and support have the same moral compass. So they can get away with it. (PD). That just doesn't fly with moderates or conservatives who will have a voice in who will challenge the evil left in 2016.