Hillary Clinton is back. And, yet again, she’s fired up and ready to go…this time in support of former opponent Barack Obama. Using her Tuesday night prime time slot at the Democratic National Convention as a launching pad, the New York senator delivered what will undoubtedly be remembered as one of the single greatest speeches of her already distinguished career. Marked by an unquestioning endorsement of Barack Obama and a rejuvenated call to social action, Clinton proved once again that she is a force to be reckoned with.

“We don’t have a moment to lose or a vote to spare,” she said of the task facing the Democrats in November. “No way. No how. No McCain.”

The magic of the evening was apparent from the outset, in which Clinton was introduced by a video tribute produced by her own creative team, a detail negotiated specially for the senator. The video set the tone for Clinton’s appearance, featuring flawlessly edited archival footage, rock music, and a powerful message of social change.

Clinton wasted no time facing the obvious elephant in the room, challenging her most loyal supporters to vote for the cause, and not allow the bitterness of the primary to affect the election’s outcome. “Obama is my candidate, and he must be our candidate,” she said.

“You haven’t worked so hard over the last 18 months, or endured the last eight years, to suffer through more failed leadership.”

Many of the delegates and party activists in the crowd had tears in their eyes as Clinton said “Whether you voted for me or voted for Barack, the time is now to unite as a single party behind a single candidate.”

“It looked like a unified party,” said MSNBC Political Director Chuck Todd. “To be sure, last night’s speech won’t end some of the tension and hard feelings. But both ObamaNation and Hillaryland got what they wanted out of last night’s speech.”

In addition to helping to unify the party behind Obama, Clinton’s speech sets up the New York senator for another run at the presidency in 2012 in the event that Obama fails to win in November.