How did evangelical Christians shift from being reluctant supporters of Trump to among his most passionate defenders? How did some evangelicals, historically suspicious of politicians, develop a “fanatical cult-like attachment” to Donald Trump? And what happened to the evangelical movement,  as some bought into Trump’s vision of America and others recoiled?

A few weeks before the Iowa caucuses we talk to Tim Alberta, a staff writer at the Atlantic and author of the new book The Kingdom, the Power and the Glory: American Evangelicals in an Age of Extremism.

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