For the same reason his name barely comes up when discussing what led up to 9-11 or any other scandal/negligence/incompetence/corruption in his eight years of desecration; he has a sycophantic media covering his butt, who want to make sure nothing gets blamed on him and his harridan wife, who they want back ASAP.
The media elected him. And, if they didn't protect him, who would...???
See, it's all an exercise in accepting responsibility for one's own actions...