Some politicians go to Washington and forget the folks back home except when elections are near. Sen. Charles Grassley, Iowa's senior United States senator, isn't one of them. He has a well-deserved reputation as a public servant who keeps in close touch with his constituents. His annual visits to each of the Hawkeye State's 99 counties have institutionalized an excellent opportunity for communication between the Republican senator and voters. Grassley's listening tours are a superb example of how officeholders should relate to the people they represent.