This would simply be a web site where each elected official's promises were stated and flagged showing whether they were kept, broken, in-process or inactive. A percentage based on kept divided by (kept + broken) would give us a fairly accurate estimate of their reliability when re-election time comes around.

I had something like what shows up on the right side of this link in mind, only for all politicians -

http://www.politifact.com/truth-o-meter/

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