If you are curious about the history of money in politics, the Center for Responsive Politics has created an informative timeline that will answer many of your questions. Find it at OpenSecrets.Org.
About the author
JoAnn Chateau likes progressive politics and loves the canines. She sometimes writes fiction about Chester (the Alpha Bichon) and his friends -- with a dash of humor and dab of Poli-Sci. JoAnn's views and insights are tinted by her past profession in Counseling, Christian theological studies, and Library and Information Science training. Retired now, JoAnn enjoys the creative life.