Lobbying in the United States describes paid activity in which special interests hire well-connected professional advocates, often lawyers, to argue for specific legislation in decision-making bodies such as the United States Congress. It is a highly controversial phenomenon, often seen in a negative light by journalists and the American public. While lobbying is subject to extensive and often complex rules which, if not followed, can lead to penalties including jail, the activity of lobbying has been interpreted by court rulings as constitutionally protected free speech and a way to petition the government for the redress of grievances, two of the freedoms protected by the First Amendment of the Constitution. Since the 1970s, lobbying activity has grown immensely in the United States in terms of the numbers of lobbyists and the size of lobbying budgets, and has become the focus of much criticism of American governance. It is possible for foreign nations to hire American lobbyists to influence the foreign policy of the United States; for example, in 2016, Taiwanese officials hired American senator-turned-lobbyist Bob Dole to set up a controversial phone call between president-elect Donald Trump and Taiwanese President Tsai Ing-Wen, a move marking a shift in US foreign policy.
Since lobbying rules require extensive disclosure, there is a large amount of information in the public sphere about which entities lobby, how, at whom, and for how much. The current pattern suggests much lobbying is done primarily by corporations, although a wide variety of coalitions representing diverse groups also occurs. Lobbying takes place at every level of government, including federal, state, county, municipal, and even local governments. In Washington, D.C., lobbying usually targets members of Congress, although there have been efforts to influence executive agency officials as well as Supreme Court appointments. Lobbying can have an important influence on the political system; for example, a study in 2014 suggested that special interest lobbying enhanced the power of elite groups and was a factor shifting the nation's political structure toward an oligarchy in which average citizens have "little or no independent influence".