Well that's blatantly false.
That was Trump's entire campaign. All I've heard all year was "Benghazi", "emails" and "crooked", all of which were just rephrasing of the same thing, repeated in perpetuum. It most definitely worked.
He promised huge tax cuts, a reformed health care system which is more accessible and tariffs that brought back manufacturing jobs. He promised a lot of other things but I'm mentioning what attracted the working class towards him.
He only started attacking Hillary much later.
It's true, that's all you heard, but that's not all that he was saying and the part that you didn't hear ... that's why he won. Those who voted for him heard a different message, one specific to their economic circumstances. It's always the economy. And while the aggregate macro picture looks good, we are going through some major shifts underneath those numbers.
I've come to realize that all their statistics foo is just peddled propaganda in opaque packaging. Utterly worthless.