Abraham Lincoln had political ambitions from a very early age. NPR Morning Edition co-host Steve Inskeep’s new book, “Differ We Must: How Lincoln Succeeded in a Divided America,” details sixteen interactions with people who differed from him — and who helped him become a savvy politician. The book contains several St. Louis-area connections, including Lincoln’s interactions with Owen Lovejoy of Alton, Joseph Gillespie of Edwardsville, and Jessie Benton Frémont who was in St. Louis at the start of the Civil War.