I stand before you tonight as a young American, a proud American, of a generation born as the Cold War receded, shaped by the tragedy of 9/11, connected by the digital revolution and determined to re-elect the man who will make the 21st century another American century - President Barack Obama.

A couple of years ago, my wife, Erica, and I were getting our daughter ready for school and an image of President [Barack] Obama was on one of the morning shows. And I said, oh, look, Carina, there's the president. You can be president one day. And she said, right away, that's for boys. And so right away I said, oh, no, you can be a doctor. You can be a lawyer. You can be anything you want. You can be president.

Donald Trump is just unfit, unprepared, just doesn't get it, shouldn't be the commander in chief of America.

Mitt Romney has undergone an extreme makeover, and it ain’t pretty.

Donald Trump ought to realise that being a president is different to being a candidate and that there is a responsibility that comes with the office.

With the opportunity we build today for a shared prosperity tomorrow, America will prevail. It begins with re-electing Barack Obama.

I cannot imagine a scenario where Donald Trump does better than Mitt Romney with the Hispanic vote.