Source: Campaign Finance Institute
From press release:
Access to state-level candidate campaign disclosure data continued to improve in states across the country, according to Grading State Disclosure 2007, a comprehensive evaluation of campaign finance disclosure laws and programs in the 50 states. The 2007 study, released today by the California Voter Foundation, found that Washington State ranks first in the nation in campaign disclosure, while Oregon ranked as the most improved state in 2007.
The assessment was conducted by the Campaign Disclosure Project, which seeks to bring greater transparency and accountability to money in state politics. The project is a collaboration of the California Voter Foundation, the Center for Governmental Studies and the UCLA School of Law and is supported by The Pew Charitable Trusts.