Democrats today are more likely to say they want their party to become moderate than they were four years ago, according to a Gallup poll published Thursday. The survey, conducted in the first week of President Trump’s second term, gauged partisan preferences on the ideological direction of respondents’ respective parties. Among Democrats and Democratic-leaning independents, 45 percent say they want their party to become more moderate, while 29 percent say they want the party to become more liberal, and 22 percent say they want the party to stay the same.
There was an article up on Slate Star Codex some time back talking about ingroups.
It’s a long, kinda rambling thing, though I think that it’s a worthwhile read. But one specific chunk of it talks about how there is an absolutely staggering tendency for people to become segregated into groups of politically-like-minded people. That tends to result in people having a very hard time believing that people with different political views even exist, because they don’t interact much at all.
https://slatestarcodex.com/2014/09/30/i-can-tolerate-anything-except-the-outgroup/
Relevant section