This site ranks members of Congress according to their acceptance of four categories of campaign contributions since the 2000 election cycle:

• K Street Cash:   the amount of money received from lobbyists;
• On Tour: the amount of money received from out-of-state donors;
• Fat Cats or Passing the Hat:   the amount of money from large versus small donors; and
• PAC-Men and PAC-Women:   the amount of money from political action committees (PACs).

Adjustments were made to the data to ensure an apples-to-apples comparison, and the adjusted data were used for the rankings. Data for all of the categories begins with the 2000 election cycle, which started in January 1999. Ending dates vary: Lobbying data end December 31, 2005, while the other three categories – PAC, Out of state, Small donors – end in June 2006.