Searchable database of unregulated political contributions

ProPublica updated their explorer for money flowing into 527s.

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.