My problem is that Democrats are way too dependent on lawyers for their top tier politicians. Certainly much more than Republicans. Of the last four Republican presidents, none were lawyers, but of last 4 Democratic ones, half were lawyers. Note that polarization is relatively recent, because before 1980 there were more lawyer Republican presidents and more non-lawyer Democratic ones. Both Democratic presidents since 1980, Obama and Clinton, were lawyers, while LBJ and Carter were not. Furthermore, the 2016 Democratic candidate, Hillary, was a lawyer, as were John Kerry (2004), Michael Dukakis (1988) and Walter Mondale (1984). Al Gore (2000) wasn't a lawyer, but even he attended law school without completing it. So, Democratic presidents and nominees have been a bit one note for the last 40-odd years!
That lack of educational/professional diversity can give rise to a certain groupthink. That groupthink can manifest in in giving perks to the lawyerly guild like the extremely lucrative "punitive damages" (which do not exist in this form anywhere else) or the fact that US is the 2nd most over-lawyered country in the world (after Israel). But the lack of intellectual diversity can infect and affect discussion of all kinds of issues that the government faces.