Mueller, like Comey, has a long record of incompetence, if not sedition. Here’s an article with video on his testimony regarding his supposed investigation into Obama’s misuse of the IRS:
http://www.theblaze.com/news/2013/06/13/gop-rep-grills-fbi-director-who-apparently-knows-astonishingly-little-about-irs-investigation/
Mueller will never recuse himself. Never.