WATCH: Trump Does Colbert, Declines Chance To Discuss Birther Past

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NEW YORK — (CNN) Donald Trump ducked an attempt Tuesday by Stephen Colbert to get him to say whether he believes President Obama was born in the United States.

Colbert called the question a “big fat meatball” that Trump would never have to respond to again if he answered during an afternoon taping of the “Late Show” episode.

“Barack Obama, born in the United States?” Colbert asked.

“I don’t talk about it anymore,” Trump deflected, saying he would rather talk about jobs and veterans’ affairs.

After Trump didn’t answer, Colbert said that the “meatball is now being dragged down the steps of a subway by a rat.”

Trump has in the past been a vocal supporter of claims that Obama was not born in the U.S.

The brash presidential candidate was Colbert’s headliner on Tuesday’s “Late Show.” The two spoke about immigration, the Iran deal, and Trump’s run for the White House.

“I want to thank you for running for president,” Colbert said. “I’m not going to say this stuff writes itself but you certainly do deliver it on time everyday.”

Trump, the GOP front runner, has done many late night appearances, but never with Colbert before Tuesday.

Tuesday was a gamble for Trump since Colbert isn’t known to pull punches with his guests, especially those in the political realm.

However, Colbert was cordial and Trump seemed comfortable playing to the audience, some of whom gave him a standing ovation when he came out.

Trump wasn’t Colbert’s only political guest on Tuesday. Secretary of Energy and architect of the Iran nuclear deal, Dr. Ernest Moniz, was Colbert’s second guest.

With Trump being a vocal critic of the deal, Colbert had the mogul sign a copy of his book “The Art of the Deal” for Moniz. Trump jokingly signed the book, writing, “better luck next time.”

Trump bashing has been a frequent facet of Colbert’s “Late Show.” One of the highlights of Colbert’s debut earlier this month was a bit in which Colbert gorged on Oreos while also gorging on Trump news coverage.

The “Late Show” appearance for Trump comes a little more than a week after he visited Colbert’s late night rival Jimmy Fallon and “The Tonight Show.”

Trump’s “Tonight Show” guest spot was considered to be a “love-fest” by some, but gave Fallon a big ratings win over Colbert that night.

Colbert spent years grilling politicians as a fake pundit on Comedy Central’s “The Colbert Report.”

In fact, Colbert played a game with Trump on Tuesday to see if he could figure out which quote was said by Trump or by Colbert’s “Report” character.

The-CNN-Wire ™ & © 2015 Cable News Network, Inc., a Time Warner Company. All rights reserved. (PHOTO: CBS Late Show)

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