Jon Stewart mocked President Obama last night after the chief executive suggested that he had no knowledge of the problems with the Obamacare website until shortly after it launched.

"You didn't know there would be problems until the day it launched?" Stewart asked incredulously. "This is your signature program; your name is on it!"

Stewart also mocked Obama after other officials in his administration claimed he had no knowledge of the National Security Agency's program to monitor German Chancellor Angela Merkel's cell phone.

Stewart then turned to his "White House correspondent" who reported that Obama had to remain in a bubble so he could give inspirational speeches about hope and change.