"Because we're losing our great president to term limits, it will be a change election. We have to decide, are we going to change forward together or backward? I think you know what the answer is going to be," Bill, 70, told a cheering crowd in Philadelphia yesterday.
The crowd was also addressed by Hillary, her daughter Chelsea, outgoing US President Barack Obama and the First Lady Michelle Obama.
"And, no matter what happened, she said, 'We're stronger together'. That means answers are better than anger. Empowerment is better than resentment. Working together is better than fighting all of the time. And it's way better to lift somebody up than put people down. That is the candidate you are for," he said.
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Chelsea said it had been one of the great honours for her to travel throughout the country over the last months.
"To meet the thousands of organizers who are working so hard with probably no sleep, to meet so many of the million volunteers who have been part of this campaign, and to now be here tonight with the tens of thousands of people here is just extraordinary. I am so, so grateful," Chelsea, 36, said.
"And I am so fiercely, ridiculously proud of my mom. I am unapologetically biased towards her. I hope that many of you now understand after this campaign why that is so true for me. I cannot wait to cast my vote for her tomorrow," she said.
"We have been traveling across the country separately, trying to cover as much ground as possible and talk to as many voters as we can, but I'm really glad that we're all together tonight in Philadelphia with you," she said.
"But in addition to all of that, what is so special for me is that we have our amazing President and First Lady with us because for now nearly eight years they have served our nation with grace, strength, brilliance, and a whole lot of cool. And they have shown us again and again, as Michelle said when others go low, we go high," Clinton said.