Source: https://www.fec.gov/data/browse-data/?tab=bulk-data

All data provided from the Federal Election Commission. That is, except individual contributions, which are provided in a separate dataset here: https://www.kaggle.com/datasets/dubradave/openfec-individual-contributions.

Download bulk data Downloadable bulk data files contain data from statements and reports filed with the Commission in a form that may be useful to users performing in-depth campaign finance research. The files, which were previously located on the Commission's file transfer protocol (FTP) server, can be very large because they contain transaction-level data. The update schedule of these files varies from daily to weekly. Expand each file's accordion to read more about what is contained in the file.