Open Secrets tracks fundraising sources using FEC filings for all 435 Representatives and 100 Senators in Congress. We analyze this data to show what percentage comes from Big Money sources—like PACs, corporate lobbyists, and individual donations over $200. To calculate the
Big Money Funding Rate, we use the
percent of Total Funding from Big Money divided by hours in office this term. In other words, the Big Money Funding Rate shows how much Big Money pays to influence our elected representatives
for every hour they're in Congress!