The Federal Election Commission (fec.gov) is the regulatory agency responsible for enforcing campaign finance laws. The agency requires public disclosure of funds raised and spent on federal elections and reports data through its website.
The Center for Responsive Politics, a campaign finance watchdog group founded in 1983 by two former US Senators, maintains Open Secrets, a comprehensive database of campaign finance data. Open Secrets also publishes accessible research on the influence of money in American politics to inform the voting public.
Run follow up web searches on major contributors to learn about their potential motivations for supporting your candidate. Look at which committees and subcommittees your representative serves on and see if there are any connections.
For example, Open Secrets shows that the American Israel Public Affairs Committee and General Atomics were the top contributors to Rep. Aguilar's campaign committee and leadership PAC in 2024. What can you find out about these companies from searching their websites?
If you're not familiar with the industries that are represented in Open Secrets lists, try searching the Mergent Intellect library database to get information on what the industry produces and what kind of legislation, (de)regulation or other action it is likely to expect from Washington.
