President Barack Obama and Republican rival Mitt Romney have made a series of lighthearted jabs at themselves and each other at a charity fundraiser.

At the event organised by the Catholic Archdiocese of New York, Mr Obama said his first debate performance - which he was judged to have lost - had been a "long nap" to prepare for the second.
President Obama and Mitt Romney finally found something they could agree on during Thursday night's 67th annual Al Smith white-tie charity dinner: Jokes about Vice President Joseph R. Biden Jr. get big laughs.
"I've heard some people say, 'Barack, you're not as young as you used to be. Where's that golden smile? Where's that pep in your step?' " Mr. Obama said. "And I say, 'Settle down, Joe. I'm trying to run a cabinet meeting here.' "