FORT COLLINS, Colo. -- President Obama swiped at the Republican National Convention during a campaign speech on the campus of Colorado State University Tuesday, accusing the GOP of staging a "well-produced" show with "all kinds of TV producers" but failing to "offer a path forward."

"The show in Tampa will, I'm sure, be very entertaining, and I'm sure they'll have wonderful things to say about me," Obama told an outdoor crowd estimated to number 13,000 by university officials.

Obama criticized Republican opponent Mitt Romney for proposing tax cuts for the wealthiest Americans, vowing to repeal Obamacare and criticizing the president's position on climate change.

"Denying climate change doesn't make it stop," Obama told the cheering, student-heavy crowd.

When the crowd booed at the mention of Romney, Obama said: "Don't boo -- vote! That's the best response. Vote and get some of your friends to vote."