What the hell is wrong with you?https://twitter.com/BostonGlobe/status/892485878731476993 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
afaik it's pretty well established that denser populations tend blue
possible problem is that urban density in the US is a function of westward expansion (roughly old, east, dense | new, west, sparse)
so you'd have to be careful to isolate density from the rest
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.