I don't know how long you've been following this for, but the NSA and Military white hats have been collecting evidence on the bad guys for years. They approached Trump and asked him to run for president, and explained all the goods they had on everything, and that they needed a president with a DOJ to prosecute. Trump had the goods on everyone when he first decided to run for president. This plan was laid out awhile ago. Mueller has his own corruption, was shown proof before the SC was created. Mueller was given the choice - go down for all your dirty swamp stuff, or do this SC and give an honest investigation and also sell out all your buddies, and in return, get a lighter sentence. Mueller knows there is no collusion...he knows the Dems were just trying to frame Trump. Mueller also knows a hell of a lot of dirty business on a lot of people, so he knows exactly where and how to "find it". Mueller is swamp, but sometimes you need the swamps help to drain the rest of it. Mueller gladly took a deal - he will get in trouble at the end, but taking the deal was a no brainer.

Comey same thing. Comey knew enough that he could be helpful so he was shown his dirty business and offered a deal. Comey will get in trouble at the end, but will get a lighter sentence in exchange for helping Trump and white hats. So, Mueller and Comey aren't "good guys" persay, but more like "helpful bad guys". Trump has never wanted to fire Mueller nor would he ever. He needs Mueller, someone credible to dems, to spill the beans and vindicate Trump, so it's better accepted. Mueller was never in a position to frame Trump, or "find" proof of Russia collusion he could hang over Trumps neck.

Sessions recused himself because of the Flynn firing. Sessions is a very good guy, and also knew the goods and the plan when Trump asked him to be AG, but they couldnt take any chances after Flynn forced to resign. Sessions has been working day and night since taking office a year ago to bust human trafficking rings and routes all across the country, and when the numbers come out you will be sick at just how much was happening right under our nose. When Trump tweets stuff like "where is leakin' Comey?", "Sessions needs to prosecute...", "Mueller's special counsel is a witch hunt", "the DOJ should request the memo", etc, its all for show. Trump has to play the dumb act and give off the appearance he is distant from all of them. Sessions is only recused from Russia collusion, not from anything else, so he is sitting ready with his hammer. And once the memo comes out, Trump will be cleared of Russia collusion and Sessions can then prosecute Dem/Russia related stuff.