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In “The Populists,” George Packer writes that Bernie Sanders and Donald Trump harness populism's appeal—and demonstrate its limits.

In “Keeping Secrets,” Steve Coll writes about Hillary Clinton’s e-mail scandal, arguing that, unfortunately for the candidate, the law around classified material can resemble a hall of mirrors.

In “Race and the Storm,” Jelani Cobb writes that Hurricane Katrina wasn’t just a natural disaster. It was the start of a referendum on black citizenship.

In “Exit, Stage Left,” David Remnick reflects on Jon Stewart’s career and his responses, on “The Daily Show,” to political life in America.

In “Broken,” Amy Davidson writes about Donald Trump’s success in the polls and what it means for a debate in Cleveland co-hosted by Fox News and the Ohio Republican Party.

In “The Deal,” Steve Coll examines the I.A.E.A.-monitored nuclear accord with Iran, and how it could affect the Middle East’s conflicts.

In “Homage to Zenobia,” Lawrence Wright reflects on ISIS’s conquest of Palmyra, a Syrian town once ruled by a strong-willed queen.

In "Last Battles," Jelani Cobb examines the Confederacy's final retreat.

Listen to Jelani Cobb’s Comment “Terrorism in Charleston,” which examines the term “domestic terrorism,” starting with the Ku Klux Klan, and the reluctance to apply it to the murders committed by Dylann Roof.

In "Coming to Terms," Philip Gourevitch writes about Africa and democracy.