Well that is something that's easy to see and well known,
but here's an example I wanted to share with everyone
Currently Ron Paul has a bill to Abolish the Federal Reserve,
yet this isn't the first time he's done this.
Go to the given link and you will see links to 3 past congressional terms (106th,107th,108th) in which Ron Paul brought up the same Bill which never passed.
Yet he doesn't give up and continues to fight for whats right and true.
Urge your congressman to support Ron Paul's HR2755!
H.R. 2755: Federal Reserve Board Abolition Act (GovTrack.us)