Acknowledging that he is not a perfect man and would not be a perfect president, US President Barack Obama today asserted that he would have to work hard to address some of the challenges that his administration has been facing of late, including the drop in his popularity.

"You know, there are going to be ups and downs during the course of my presidency. I think I said early on when I was running, I am not a perfect man and I will not be a perfect president, but I'll wake up every single day working as hard as I can on behalf of Americans out there from every walk of life who are working hard, meeting their responsibilities but sometimes are struggling because the way the system works isn't giving them a fair shot," Obama said.

"And that pledge I haven't broken. That commitment, that promise continues to hold; the promise that I wouldn't be perfect, number one, but also the promise that as long as I've got the honour of having this office, I'm just going to work as hard as I can to make things better for folks," Obama told reporters at a White House news conference.