President Obama Asks Cameras to Leave Before Q & A So Mayors Can "Tell Me the Truth" - Video 1/21/10
Here is video of President Obama speaking to a group of Mayors today, where at the end of his remarks, he told the Mayors he was going to take some questions, but said he would ask the cameras to leave "so you can tell me the truth."
Actually, it may be the President was afraid some mayors would "tell him the truth" with the cameras rolling!
UPDATE: I don't think the meeting was at the White House. I originally said mistakenly that it was.