Is the congressional power to create U.S. law being sold to highest spender? Are members of both houses acting on outside interests instead of the interests of the American people? The following sources will allow you to find exact dollar amounts flowing through Congress, track campaign contributions to the member, and track how the member voted, among other ways money can influence politics.
These sources are free to anyone:
Followthemoney.org -- Provides free access to federal and state level campaign contributions. Data can also be accessed through an API or downloaded.
LobbyView -- via MIT, allows tracking of lobby funds going back to the late 1990's for many organizations, companies, cities, etc. Track by organization or bill number. Also provides access to lobbying disclosure forms.
Provides tracking of the flow of money in politics at the federal level with some state information from 1980 to the present. Enables tracking of contributions from Political Action Committees (PACs), individual donors to politicians, elected officials, and party committees; follow soft money through 527 groups, and retrieve information on thousands of lobbyists, indexed by client and issue. (Congressional Quarterly)
Use the Vote Tables to see how each member of congress voted on bills back to 1945. May be missing the current year's information.
Building on the reporting and analysis done throughout the year by CQ's news staff, the Almanac offers original narrative accounts of every major piece of legislation that lawmakers considered during a congressional session. Arranged thematically, CQ Almanac organizes, distills, and cross-indexes the full year in Congress and in national politics. Its clear and concise language makes the Almanac an essential resource for scholars, journalists, interested citizens, and students of the U.S. legislative system.
Congressional Spending on Congress
The U.S. Congress is required to publish the receipts and expenditures of all its committees, leadership, and members. Both the House and the Senate publish this information quarterly.