The only ones I have seen who have meekly questioned the accuracy have been DNC stooges. The independents do not seem to be questioning the accuracy and the Bernie people are worked up over them. The DNC and Obama haven't been doing much denying just trying to distract by blaming the Russians and indirectly Donald Trump for releasing them. That does not seem like a winning argument.
It is all they have. Blame the messenger. The message itself, the e mails, digging in them for confirmation would only bring more light. They cannot risk that.
The other problem with this concerns the involvement of the Russians. If they are indeed participating in this election, many people will resent it. In fact, there are many people who might choose to vote in a manner designed to frustrate the efforts of a foreign country like Russia.
I think that the Trump campaign should be very careful about how they handle these issues. I notice that Trump has tweeted an assurance that he has no assets in Russia. That makes sense.