Conversation so far:
what was bernie Sanders' position on legislation?
Bernie Sanders was known as a legislator who advocated for progressive causes but rarely forged actual legislation or left a significant imprint on it
what did Bernie Sanders accomplish?
Bernie Sanders voted against the Brady Bill, which mandated federal background checks when buying guns and imposed a waiting period. The bill passed by a vote of 238–187
what did Bernie Sanders vote for instead?
Bernie Sanders voted against the bill four more times in the 1990s
what was Bernie Sander's best accomplishment?
In 1999, Bernie Sanders voted and advocated against rolling back the Glass–Steagall Legislation provisions that kept investment banks and commercial banks separate entities.
what did Bernie Sanders  say/do?
during a question-and-answer discussion with the then-Chairman, Sanders told him he was concerned that Greenspan was way out of touch.“
Greenspan was way out of touch with what?

Question: what is the most important fact in this article?
Self-contained rewrite: what is the most important fact in the bernie Sanders article article?