Social reinforcement and lack of having to do real work for a living.
They BUY it!
Short answer - gerrymandering.
https://www.amazon.com/dp/B003KN3IXA/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1
The Blueprint: How the Democrats Won Colorado (and Why Republicans Everywhere Should Care)
The above is an excellent book explaining the inner workings of the Democrats
Well, one way to deal with these cities would be gentrify and run the scum out. Turn them from urban hellholes to gilded forts with no place for poor to live. End of problem.
Conservatives tend to like their privacy, individuality and to have some space. So they tend to live in the suburbs. Liberals tend to be more tribal.
Urban Cheat Islands
1)Oregon has had a large influx of liberals moving into certain areas from southern California.
2)Oregon has had a large influx of welfare recipients from other states because there is no residency time period required.
3)The RNC has given Oregon republicans the finger and won’t spend any money here even though they could have won. We don’t have all that many electoral votes.
Not many counties in Oregon went for Hillary. These Dem counties are shitholes full of liberal idiots. The rest of us are sick of them.
http://www.politico.com/2016-election/results/map/president/oregon/
LOL! I misread that headline as:
“How Democrats Keep Their A$$es Blue”
Answer: Keep doing what you are doing, and we’ll continue to kick them for you!