Donald Trump made an appearance on "The Late Show with Stephen Colbert," with the comedian pointing out that a lot of what Trump has said over the years sounds like his "over-the-top" alter-ago from "The Colbert Report."

He then quizzed Trump to see if he could pick which statements he made and which ones were from the satirical Comedy Central character.

For instance: "It's freezing and snowing in New York. We need global warming."

Watch the quiz above.

Trump also explained his plans for a "great and beautiful wall" along the Mexican border. 

Colbert asked Trump to role-play a negotiation in which he pretended to be the Mexican president, challenging the Republican presidential frontrunner on how he'd convince Mexico to pay for it. 

Trump answered that the U.S. has a $45 billion trade deficit with Mexico, while the "serious wall" he is proposing would cost around $5 billion.

Colbert joked that the wall should include a moat filled with fire and "fire-proof crocodiles."

Colbert then threw a "meatball" question at Trump, simply asking whether President Obama was born in the U.S.

"I don't talk about it anymore," said Trump, adding he wants to focus on issues like caring for our veterans and creating jobs. 

Watch that exchange below.