The vast majority of these counties voted for Donald Trump — even if they had backed Democrats for years

A new analysis of labor data offers insight into why Donald Trump delivered surprise wins in Michigan, Wisconsin and Pennsylvania. Yes, he swept the Rust Belt. But more specifically, he won over voters in counties that were most dependent on blue-collar work — including hordes of longtime Democratic voters.

The report from Emsi, a labor market advisory firm, found nearly every Rust Belt county with a higher-than-average concentration of manufacturing, mining or agriculture jobs backed Trump, including some that had supported liberal contenders since 2000. CONT.

Danielle Paquette, Washington Post