Letterman to Couric: "What about this bonehead Rush Limbaugh?" Video ››› March 3, 2009 8:18 AM EST ››› MEDIA MATTERS STAFF ? Loading the player reg... Watch this video at Media Matters Short Link copy link Person Rush Limbaugh Stories/Interests Propaganda/Noise Machine We've changed our commenting system to Disqus. Instructions for signing up and claiming your comment history are located here. Updated rules for commenting are here. View the discussion thread.