Nassau County is 65% non-Hispanic white. And Jews are about 15%. The GOP would have to do as well among non-Jewish white people as the Dems do with Blacks, Asians, Hispanics, and Jews just to break even. It's amazing the Republicans do as well as they do. Must be a lot of Peter King type folks out there.
Well, minorities tend to have lower turnout, so the GOP wouldn't have to do
quite as well, but yeah. The fact that the suburbs are less and less white is a big reason that many of them have trended D.