The US President was addressing a group of supporters at the House of Blues on L.A.'s Sunset Strip on Monday night. During the president's remarks, an unseen man approaches the stage, and proceeds to shout at the top of his lungs, calling Obama the "antichrist." From the Telegraph:
The heckler had positioned himself at the front of the stage, directly in front of the president and began shouting just as Mr Obama began speaking.

"The Christian God is the one and only true living God, the creator of heaven and the universe! Jesus Christ is God!," said the unidentified man before declaiming the president as the antichrist.

Security soon stepped in to drag the man from the theatre as the crowd shouted "four more years" to drown him out.