Perhaps most significant, a March 20 Pew Research Center public opinion survey found that 33 percent of Democratic voters and Democratic leaners are whites without college degrees. That’s substantially larger than the 26 percent of Democrats who are whites with college degrees — the group that many analysts had come to believe was the dominant constituency in the party.

According to Pew, this noncollege white 33 percent makes up a larger bloc of the party’s voters than the 28 percent made up of racial and ethnic minorities without degrees. It is also larger than the 12 percent of Democratic voters made up of racial and ethnic minorities with college degrees.

In sum, Pew’s more precise survey methods reveal that when Democrats are broken down by education, race and ethnicity, the white working class is the largest bloc of Democratic voters and substantially larger than the bloc of white college-educated Democratic voters.