https://en.wikipedia.org/wiki/OpenSecrets

OpenSecrets is a nonprofit organization based in Washington, D.C. that tracks and publishes data on campaign finance and lobbying, including a revolving door database which documents the individuals who have worked in both the public sector and lobbying firms and may have conflicts of interest.[6][7][8][9] It was created from the 2021 merger of the Center for Responsive Politics (CRP) and the National Institute on Money in Politics (NIMP)