See How They Ran: The Changing Role of the Presidential Candidate in American History book by Gil Troy we mention on Podcast 972

https://www.amazon.com/See-How-They-Ran-Presidential/dp/B010IK8ARG/ref=sr_1_3?s=books&ie=UTF8&qid=1472010908&sr=1-3&keywords=see+how+they+ran