Obama cries
US President Barack Obama cries while adressing members of his staff in Chicago (YouTube)

Footage of an emotional Barack Obama crying while addressing members of his staff at the end of his victorious re-election campaign is becoming an internet sensation.

The day after defeating Republican candidate Mitt Romney at the ballots, the President visited his campaign headquarters in his home town of Chicago to thank his staff.

Visibly tired by the draining race for the White House, Obama stood at a microphone in front of a jubilant crowd of members of the Obama2012 campaign, most of whom were in their 20s and 30s.

Obama delivered a five minutes speech, in the middle of which the President had to wipe tears away from his eyes, as his voice broke down telling his staffers: "I'm really proud of all of you."

"I come here and I look at all of you ... what comes to [my] mind is not that you guys actually remind me of myself, is the fact that you're so much better than I was ... You're smarter and you're better organized and you're more effective," Obama said.

"I'm absolutely confident that all of you are just going to do just amazing things in your lives."

"What Bobby Kennedy called the 'ripples of hope,' when you throw a stone in the lake, that's you."

"That's why even before last night's results I felt that the work that I've done in running for office has come full circle. Because what you guys have done means the work that I'm doing is important. And I'm really proud of that. I'm really proud of all of you," Obama said choking up with emotion and receiving a burst of applauses back.

The video was posted on YouTube by members of the President campaign.