CampaignView

Dive into the records, learn about candidates, and explore their policies. Evidence to help you get informed, supported by latest political science research.

(www.campaignview.org)

I give it a +1 for being a nice idea, and a -1 for being built as a javascript application (with all the related privacy & security issues) instead of a web page.

Related work:

OpenSecrets

OpenSecrets is the nation's premier research and government transparency group tracking money in politics and its effect on elections and policy.

OpenSecrets (www.opensecrets.org)