The comment came in banter between Obama and a patron at the Buff, a restaurant in Boulder, the Los Angeles Times reported.
Jim Osbourne, a Los Angeles lawyer who had stopped by the Buff, told the president he had attended Obama's inauguration in 2008.
Obama, replied, "It was cold that day. This one is going to be warmer. I'm looking forward to it," the Times reported.
Obama was in Boulder for his fourth college town rally in a week, trying to appeal to new young voters. When he made mention of Republicans, some in the crowd of 13,000 at the University of Colorado, Boulder, booed, the Times said.
In what's become a favorite tag line, Obama told the crowd, "Don't boo. Vote!"
"Despite all the challenges that we face in this new century, what they offered over those three days [at the Republican convention] was an agenda that was better suited for the last century," Obama said "It was a rerun. It could have been on 'Nick at Nite. ... You might as well have watched it on a black-and-white TV, with some rabbit ears. "
Obama said the Republicans talked a lot "about 'hard truths' and 'bold choices,' but the interesting thing was nobody ever bothered to tell us what they were. And when Governor Romney finally had a chance to reveal the secret sauce, he did not offer a single new idea. It was just retreads of the same old policies we've been hearing for decades, the same policies that have been sticking it to the middle class for years."