"I'm the only one on this stage who did not vote to deregulate swaps and derivatives, as Senator Sanders did," she said. "That contributed to the collapse of Lehman Brothers, and started the cascade."

Clinton was referring to the Commodity Futures Modernization Act of 2000, which Sanders voted for as a member of the House of Representatives—and which President Bill Clinton signed into law. In fact, there were significant differences between the bill Sanders signed, which passed the House by 377 to 4 (with 51 abstentions) in October 2000, and the one that became law. The bill was introduced into the Senate in December, but thanks to its chief architect, Texas Senator Phil Gramm, that body never voted on it. From The Huffington Post:

In December, Gramm — after coordinating with top Clinton administration officials — added much harder-edged deregulatory language to the bill, then attached the entire package to a must-pass 11,000-page bill funding the entire federal government.