Question: What does Mueller have in common with a Supreme Court Justice?
Answer: They both have lifetime jobs if they want!
Mueller has kept this investigation going for so long that he's running out of excuses to keep it going. Given the number of "Deep State" Democratic favoring, biased, operatives in the various departments of Government it should be apparent that if there was something really there that it would have leaked out by now. Leakers like Comey and the most recent one that was just arrested, that work in the Treasury Department are more than willing to dish out Garbage in an attempt to try and tie Trump to colluding with the Russians but, sadly for them, there is nothing there of significance or it would have long ago come out and Trump would have been indicted. The recent Senior Treasury employee was leaking information in hopes she could provide some little something that could turn into something that they could pin on Trump.
Mueller ready to issue findings, but after the Mid-Terms I believe it is
Senior Treasury employee caught leaking information