Donald Trump made gains among virtually every other demographic — Black men and women, Hispanics, Asian-Americans, and even white women. The one significant demographic in which his support cratered compared to 2016 was among white men, who make up more than one-third of the electorate. Biden made an impressive 11 percentage point gain among white, college-educated men and a 6 percentage point gain among white, non-college educated men, supposedly Trump’s core constituency.

This is a big deal in two ways. One, which has been widely noted, is that Trump made surprising gains among nonwhite Americans. The second, which has not been extensively examined, is the shift of white men to the former Vice President.

What does this mean. The first spells trouble for the Democrats. The second is unexpectedly good news for them.