Candidates for Congress report their campaign contributions and expenditures to the Federal Election Commission (FEC). Here are the candidates' reports to FEC so far for the Special Election for Oregon's 1st Congressional District:

Suzanne Bomamici

Rob Cornilles

For Bonamici, you need to click on the link to "Itemized Individual Contributions" to get the list of contributors. It is an internal javascript link, so we cannot replicate it here.

Unfortunately, FEC does not show the contributions on a comparable basis. The data for Cornilles also includes all contributions and expenditures on his race for the same seat in 2010, while the data for Bonamici is only for the Special Election. Nevertheless, the data provide a good indication of where each candidate's funding is originating.