And tonight, I think about all that she's seen throughout her century in America - the heartache and the hope; the struggle and the progress; the times we were told that we can't, and the people who pressed with that American creed: Yes we can.
At a time when women's voices were silenced and their hopes dismissed, she lived to see them stand up and speak out and reach for the ballot. Yes we can.
When there was despair in the dust bowl and depression across the land, she saw a nation conquer fear itself with a new deal, new jobs, a new sense of common purpose. Yes we can.
When the bombs fell on our harbour and tyranny threatened the world, she was there to witness a generation rise to greatness and a democracy was saved. Yes we can.
She was there for the buses of Montgomery, the hoses in Birmingham, a bridge in Selma and a preacher from Atlanta, who told people that "we shall overcome". Yes we can.
A man touched down on the moon, a wall came down in Berlin, a world was connected by our own science and imagination. And this year, in this election, she touched her finger to a screen, and cast her vote, because after 106 years in America, through the best of times and the darkest of hours, she knows how America can change. Yes we can.
America, we have come so far. We have seen so much. But there is so much more to do. So tonight, let us ask ourselves - if our children should live to see the next century; if my daughters should be so lucky to live as long as Ann Nixon Cooper, what change will they see? What progress will we have made?
This is our chance to answer that call. This is our moment. This is our time, to put people back to work and open doors of opportunity for our kids; to restore prosperity and promote the cause of peace; to reclaim the American dream and reaffirm that fundamental truth, that out of many, we are one; that while we breathe, we hope. And where we are met with cynicism and doubts and those who tell us that we can't, we will respond with that timeless creed that sums up the spirit of a people:
Yes we can.