Mayor Bob Filner of San Diego Apologizes and Says He'll Get Help: Good. But Resign First Please

http://m.washingtonpost.com/blogs/on-leadership/wp/2013/07/12/san-diego-mayor-bob-filners-frank-apology-video/

Why does a public official in 2013 think he can apologize publicly and keep his post?Details of the Allegations in article below