The only one I can see flipping is Harris County in Texas if it's a really good night to the GOP.
I guess Orange County, CA might count but that's about it.
Orange County ain't really what it used to be. Maybe if the Republican is SUPER popular but that's about it....
I live here. It's still pretty winnable for the GOP with the right, non Trump candidate. Dahle had barely any money and didn't really campaign and wasn't from SoCal and won it. Biden is also really not popular here, especially within the last year. Newport, Huntington, Westminster, Garden Grove are all pretty red. Orange, Villa Park, and Yorba Linda are super red. South OC (south of Irvine) is light red, pinkish. Dems get solid votes out of dark blue Irvine, and Santa Ana so the GOP isn't winning it by 10-15+ points by any means, but a 2-5 point victory is very much possible. Seems like the Trump years of 2016-2020 were the rock bottom years for the GOP in OC. If in 2024 the results are awful for the GOP with a non trump candidate, then I'll eat my words and say I was wrong.