> The democrat-voting population is farther left than the democrat politicians.

That is your opinion, and based on your experience in your cohort, and additionally does not really address what "more left" actually means. There are many different types of people that vote Democrat at many different stages of life, in many different industries and in different states/areas where certain things have more support than others. And that's before we even start breaking things out to being "left" socially or fiscally.

I don't think the answer is "quite simple" at all, at least not in the way you explained it.