On a day where the news focus was on the troubles of his challenger, President Obama went on "The Late Show" with David Letterman, taking the opportunity to comment on comment by Mitt Romney to a private fund raising event back in May, where Romney said 47% of voters would back Mr. Obama mainly because they are dependent on government benefits.

"My expectation is that if you want to be President, you've got to work for everyone, not just for some," said the President to Letterman, drawing rousing applause from the audience.

Here is part of the Letterman interview, as provided by CBS.