Monday on Political Rewind: a conversation with best-selling author Julian Zelizer about the roots of toxic partisanship in the United States. In his latest book, Burning Down The House: Newt Gingrich, the Fall of a Speaker, and the Rise of the New Republican Party, Zelizer explores the fame and fortunes of Newt Gingrich.

Partisan and ideological divisions have hobbled the nation’s response to the pandemic and our sinking economy. For one theory on how American politics became so toxic, Princeton professor and best-selling author Julian Zelizer turns to former Georgia Congressman and Speaker of the House Newt Gingrich.

Any thorough study of history reveals that there have always been political, economic and racial divisions in the United States. Princeton historians...