Political lobbying has always played a key role in American governance, but the concept of paid influence peddling has been marked by a persistent tension throughout the country’s history. On the one hand, lobbying represents a democratic process by which citizens maintain open access to government. On the other, the outsized clout of certain groups engenders corruption and perpetuates inequality. The practice of lobbying itself has reflected broader social, political, and economic changes, particularly in the scope of state power and the scale of business organization. During the Gilded Age, associational activity flourished and lobbying became increasingly the province of organized trade associations. By the early 20th century, a wide range at political reforms worked to counter the political influence of corporations. Even after the Great Depression and New Deal recast the administrative and regulatory role of the federal government, business associations remained the primary vehicle through which corporations and their designated lobbyists influenced government policy. By the 1970s, corporate lobbyists had become more effective and better organized, and trade associations spurred a broad-based political mobilization of business. Business lobbying expanded in the latter decades of the 20th century; while the number of companies with a lobbying presence leveled off in the 1980s and 1990s, the number of lobbyists per company increased steadily and corporate lobbyists grew increasingly professionalized. A series of high-profile political scandals involving lobbyists in 2005 and 2006 sparked another effort at regulation. Yet despite popular disapproval of lobbying and distaste for politicians, efforts to substantially curtail the activities of lobbyists and trade associations did not achieve significant success.