>> Why try to destroy the man who is about to exonerate you?
Because Mueller has no reason to wrap things up even, and perhaps especially, if he has bupkis on Trump.
Badly flawed logic, or outright lies.
Mueller and the Dems have no intention of "exonerating" Trump, and if allowed to they will investigate, leak, and destroy anyone who ever met him until the sun burns out.
Well, maybe not that long, but the probe will go on until election time, and after that if Trump wins. They will never willingly "wrap it up" or exonerate anyone.