Video: Barack Obama cracks jokes at Republican rivals expense at White House Correspondent's dinner The annual black-tie gala brought out many of America's news media elite and an A-list of celebrities, including actor George Clooney. In keeping with tradition, it was an evening of fun and humour, and a few jabs by Mr Obama at political opponents - including Republican challengers in the race for the White House. Take Mitt Romney, he and I actually have a lot in common. We both think of our wives as our better halves, and polls show to an alarmingly insulting extent, the American people agree. We both also have degrees from Harvard. I have one, and he has two. What a snob," said Obama. And also in keeping with tradition, there was a nod to recent headlines, including the scandal over allegations that US Secret Service agents consorted with prostitutes in Colombia this month. President Obama closed his monologue with a dig at the agency. And just to set the record straight, I do enjoy attending these dinners. In fact, I had a lot more material prepared but I have to get the Secret Service home in time for their new curfew. Comedian Jimmy Kimmel followed the President with a few jokes of his own. "I know the Administration has been cracking down, but if this had happened on President Clinton's watch you can damn well bet those Secret Service agents would have been disciplined with a very serious high five," said Kimmel.