"In 2017, Stanford’s Matthew Gentzkow looked at a series of Pew Research Center surveys of Americans’ views on policies ranging from government regulation to welfare, immigration, and the environment, and noted that fewer individuals in 2014 than 10 years earlier held positions that put them across the political divide from their own, self-identified political party. “Most Americans hold relatively moderate views on, say, immigration,” he writes. “But the frequency of Republicans holding pro-immigrant views, or Democrats holding anti-immigrant views, has decreased substantially.”
Where Americans’ political views and social attitudes, charted, might once have looked like a bell curve, with the majority gathered at a moderate center, the line increasingly shows two separate humps where Democrats and Republicans congregate. "
I understand that people have become more polarized on policies but this below about the difference in Republicans and Democrats' opinion on how religious Trump is (62% v 12% of them believe he's very/somewhat religious) is bizarre (64% of white evangelicals hold that opinion too).
https://www.pewresearch.org/fact-tank/2020/03/25/most-americans-dont-see-trump-as-religious/