The Late Show featured a special address on Tuesday, with host Stephen Colbert giving a presidential address to the nation from the Obama Presidential Center in Chicago's replica oval office, marvelling at all the fun little details they have around the place — until he's interrupted by the sudden arrival of Obama himself.

"Woah, they even have an exact replica of Barack Obama!" says Colbert. "Though I gotta say, this one is much older than the real one."

After Obama confirms he is in fact the real one, Colbert challenges him to "say something only Barack would say."

"Don't call me Barack," comes the response.

"That's the guy," says Colbert.