Colbert appeared on the Late Show with David Letterman last night and discussed President Obama and his trip to Iraq. When the Colbert Report traveled to the middle east to perform for the troops, one of the skits that was performed involved Colbert getting his head shaved via an order from the President. Colbert discussed how he met with Obama to film this skit and how cool the President was in front of the camera:

"He's the Meryl Streep of presidents. Yeah, it was unnerving. He would be great in Mamma Mia!."

Colbert went on to say that he is used to being cooler than the President but that is no longer the case with Obama in office.