GRAND RAPIDS, Mich. -- You have to drive all the way to the banks of the Grand River -- and travel back four decades -- to get the full meaning of the national furor over electronic surveillance. For here, within the walls of the Gerald R. Ford Presidential Museum, are the artifacts that transformed the lawmaker from Michigan's fifth congressional district into the 38th president of the United States -- and that provide the evidence from 1972 that explains the importance of the debate in 2013.The Ford Museum is a metaphor for the understated nature of the Grand Rapids congressman who was catapulted into the presidency during the gravest constitutional crisis of our history.The implements that began that crisis, its raw materials, are in a glass display case here. They are a pair of long-nose pliers, a Phillips-head screwdriver and some crude listening bugs placed in two tubes of Chap Stick.