The following sites will help you get answers about where the candidates stand on the issues, where they're getting they're money, and if their campaign ads are truthful.

OpenSecrets.org
Politifact.com
VoteSmart
FactCheck.org
Colorado Secretary of State Election center
National Journal (analysis of ads)
White House Briefing
Thomas Legislative Info (voting records)
Senate.gov (voting records)
U.S. House (voting records)
Republican Policy Committee (voting records)
UPenn Library (voting records)
Corporations.org (campaign finance)
Tray.com (campaign finance)
Federal Elections Commission (campaign finance)