Why is DuPage County, IL so far left and liberal?

[Sol]

Trump was a horrible fit for it.

Bear in mind that it's not really a Gwinnett situation where there was a ton of demographic change because it's barely grown in the past two decades. Downballot Republicans still do far better than Trump, and a non-Trump R should be able to do substantially better. Interestingly, it swung 15 points left between 2012 and 2016 but only 3 from 2016 to 2020, indicating that Democrats may be close to tapped out for now.

IDK, Illinois has such weird politics.

IIRC the tepid 2020 swing is mostly down to the large Asian and Latino swings to Trump in Northern sections of the county--the white southern half had strong swings to Biden, except in certain working class areas in the extreme south which I think are more like Will County/SW Cook.

[Sol]

This is kind of a surreal topic headline to be reading. Imagine being told in 2006 that that would one day be a question and actually a valid one and not a laughable troll one.

Yes, it’s so weird not to be discussing it as Illinois’s heartland of conservative evangelicals.

It's certainly not unprecedented though--not too different from suburban Minneapolis or MO-02 tbh.