Wait, this is just someone's opinion? There's no data here! This should be an empirical exercise, why should we trust these cities the author pulls from random

Wait, this is just someone's opinion? There's no data here! This should be an empirical exercise, why should we trust these cities the author pulls from random anecdote? One idea would be to use voter registration records and census blocks to measure the polarization of the population wrt political behavior. There's also survey data on attitudes and beliefs that could be aggregated by city. But there's no data at all, it's just the author's personal speculation.