The Louisiana gubernatorial election of 1872 might not take up prime real estate in most U.S. history books, but it holds the title as the deadliest the country has ever seen. 

In the late 1860s, a new South was emerging from the wreckage of the Civil War. The passage of the 13th, 14th and 15th amendments promised an era of multiracial equality in the region. As the 1870s began, white Southern resistance was on the rise and the nation’s political parties became deeply divided. Then came the election of 1872. 

Though tensions flared throughout the South, in Louisiana chaos ensued – two governors claimed office, warfare broke out in the streets of New Orleans, and hundreds were killed in political violence. 

Dana Bash, CNN anchor and chief political commentator, says these events changed the course of politics in our country -- and provide a cautionary tale for today. She and her co-writer David Fisher tell the story in a new book titled “America’s Deadliest Election.”