Well then it's kind of a strange coïncidence that there is a high correlation between population density and political leaning/voting:
* https://dailyyonder.com/distance-and-density-not-just-demogr...
And not just in the US:
* https://journals.sagepub.com/doi/full/10.1177/00104140231194...
* https://macleans.ca/politics/ottawa/338canada-the-urban-rura...