The micro-demographics moving most toward Democrats since 2016 are more high income and white. The groups moving toward Trump are more low-income and minority.

Upshot: At the margins, the electorate is depolarizing on race and polarizing around income. https://twitter.com/pbump/status/1314914863525892096

Caveats:

1. I’m talking margins, not absolute levels. (e.g., White Americans are still way, way more Republican than Black Americans.)

2. Pew’s great but thin-slicing the electorate creates small categories with high margins of error.

3. Might be short-term Trump effect.

This is a good point. I was summarizing the graph as literally as possible, but if you were going to plug it into everything else we know, it would be more accurate to say the electorate is polarizing around education rather than income. https://twitter.com/conorsen/status/1315682863635890176