Clinton, Iowa -- Friday, Sept. 29, 2017<br />
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Jean Pardee, a retired schoolteacher, holds an organizing poster from the 2016 election in the Clinton County Democrats headquarters. Pardee was county chairman until March and has been on the party’s state central committee for four decades.<br />
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A transformation to a knowledge-based economy has not taken root here in Clinton, Iowa along the Mississippi River. But there has been a profound structural change of another sort: white working class voters switched from Democrat to solidly Republican in the last presidential election, upending decades of political predictability.<br />
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CREDIT: Alyssa Schukar for The New York Times  <br />
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