A news report speculates that Obaman wore an ear-piece during the debates with Romney.

http://www.norcalblogs.com/gate/2012/10/was-obama-wearing-an-earphone-during-debate-with-romney-you-decide.php

The debate photos below show no ear-piece.

 

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Obama Wore an Ear-Piece During Debates?

http://watchdog.org/wp-content/blogs.dir/1/files/2012/10/DebateObama.jpg

http://cdn02.cdn.justjared.com/wp-content/uploads/2012/10/obama-debate/watch-presidential-debate-barack-obama-mitt-romney-20.jpg

http://www.mrmediatraining.com/wp-content/uploads/2012/10/Obama-Romney-Second-Debate-Photo-AP.jpg

http://cdn04.cdn.socialitelife.com/wp-content/uploads/2012/10/04/romney-obama-debate-10042012-16.jpg

http://www.unionleader.com/storyimage/UL/20121005/NEWS0605/710059995/AR/0/AR-710059995.jpg?q=100

http://www.redstate.com/files/2012/10/debate-number-21.jpg

http://cdn02.cdn.justjared.com/wp-content/uploads/2012/10/obama-second/barack-obama-mitt-romney-second-presidential-debate-20.jpg