ProPublica 527 Explorer – “Every year, hundreds of millions of dollars flow through political organizations known as 527s. These organizations are not regulated by the Federal Election Commission and are not subject to FEC-style restrictions on who can contribute or how much they can give, though donations are not tax deductible. These groups are spending more and more, topping $1 billion in 2022. Use our database to explore who funds these organizations and how they’re spending the money.”

• Search a term across all parameters. Any matches in the organization name, contributor or recipient name, contributor employer or occupation, expenditure purpose or leadership name will be returned.