Ralph Nader: Whistle-Blower. Advocate. Spoiler?

Without ever having held political office, Nader has had a tremendous political impact by advocating for improved consumer safety through seat belts, air bags, product labeling, and helping 100 organizations become watchdogs over corporate, government and environmental corruption.

Nader's role in the 2000 and 2004 presidential elections fueled controversy, and he's set to challenge the two-party system again this fall as he runs for president for the fifth time
-The Commonwealth Club of California