why didn't she sign the congressional challenge to the Florida delegation back on Jan 6, 2001?
All it needed was the signature of ONE senator before the challenge could go for debate.
http://en.wikipedia.org/wiki/United_States_presidential_election%2C_2000...
Post recount
After Florida was decided, Texas Governor George W. Bush became President-elect and began forming his transition committee. In a speech on December 13, Bush claimed he was reaching across party lines to bridge a divided America, stating that "the President of the United States is the President of every single American, of every race, and every background."<37>
On January 6, 2001, a joint-session of Congress met to certify the electoral vote. Twenty members of the House of Representatives, most of them Democratic members of the Congressional Black Caucus, rose one-by-one to file objections to the electoral votes of Florida. However, according to an 1877 law, any such objection had to be sponsored by both a representative and a senator.
No senator would co-sponsor these objections, deferring to the Supreme Court's ruling. Therefore, Gore, who was presiding in his capacity as President of the Senate, ruled each of these objections out of order.
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methinks Hillary should cool it on the blustery rhetoric...