The Center for Responsive Politics sets the standard for non-partisan reporting on campaign finance. If you are looking to dig into the latest FEC report for a candidate, go the OpenSecrets.org for detailed background on the contributors. Whether you're looking for PAC, candidate or lobbying data, OpenSecrets.org has a treasure trove of valuable information for any citizen. The interactive elections map allows users to pinpoint specific races and see donation breakdowns in Congressional elections - this resource will be especially useful next year as the donations flow into campaigns.