His bold legislative work on the Illinois Death Penalty, and how he made a difference between life and death:
http://www.icadp.org/page236.html
http://www.cnn.com/2007/POLITICS/11/12/obama.death.pena... /

His sponsorship of a bill that brought health insurance to 150,000, including 70,000 uninsured Children, again, during his time serving in the Illinois Statehouse:
http://factcheck.barackobama.com/factcheck/2007/12/14/f...
http://mediamatters.org/items/200712170003

His work on both the Immigration bill during his time in the US senate and his sponsorship of Ethics legislation (something he did both while in the State House, and in the Senate) that called for some of the most impactful reform regarding lobbyists since Watergate (as he likes to term it):http://factcheck.barackobama.com/factcheck/2007/12/14/f...
http://feingold.senate.gov/~feingold/releases/07/01/200...

and his sponsored and co sponsored Bills in the U.S. Senate.......which include worthwhile bills dealing with a wide range of issues, from Election reform bills to the Cooperative Proliferation Detection reduction Act (w/t Sen. Lugar) to Internet database transparency Act.http://www.politifact.com/truth-o-meter/statements/271 /
http://www.america.gov/st/washfile-english/2005/Novembe...
http://obama.senate.gov/press/060908-senate_passes_c /


And...