Polls can't predict the next US president this early but they can teach us
Briefly

We're pretty well beyond the point where it starts becoming meaningful [...] We're seeing a lot of variation in polls, which is not new. Most political partisans have long made up their minds about their preferred candidate. But large numbers of voters aren't really paying attention to the election campaigns yet.
The polling has a lot of noise because of polarization [...] The polling is measuring latent partisanship. But, you know, at the end of the day, it is going to be a 50-50 race coming into election day. I don't know why folks are having a hard time accepting that.
The discipline of political polling comes under perennial challenge every election cycle, occasionally metastasizing into cancerous error like unskewed polls [...] Pollsters try to focus on building a demographic model of the electorate that's accurate, to weight the results of a poll correctly.
Read at www.theguardian.com
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