I don't think that you understand how that part of statistics works. You are said that we have sampled 64% of the population, so we can extrapolate to the rest. That works if the sampling is sufficiently random. But in this case the "sampling" is people who voted, so an entirely (self) selected population, and pretty much not random at all (i.e.: people who were mostly less decisive about their opinions/vote).

So I don't think we can extrapolate confidently at all. So we really don't know whether it holds for the rest of the population at all.