Conservative commentator, author and web publisher Andrew Breitbart has died at the age of 43, according to his website, Big Government. Breitbart died of natural causes shortly after midnight in Los Angeles.

Breitbart was a regular guest on the cable news circuit, having appeared on CNN just this past Tuesday. He was on Fox News two and a half weeks ago.

Update: As of 9:45 AM, Fox News is the only cable channel to cover Breitbart’s death, and has brought on Tucker Carlson and Greg Gutfeld to talk about their former colleague.