Carl Rove, a Republican, is also defending Mueller as being fair and worthy to head this investigation but what most low-information people don't know is that Rove is very close with the entire Bush family.  Trump also once lambasted Rove in a 2015 interview.  There are many Republicans in D. C. ('Deep State') that want Trump gone.  Why?  My guess is that they aren't getting away with what they once were able to with Trump, including using the Government channels to line their own pockets.  President Trump may have approved Mueller a month ago but Mueller is now stacking the deck against him, just like most Presidential primary debates we've had throughout the years where some on the panel have even given the Democrat runner-up the questions ahead of the debate.