President Donald Trump has no love for Andrew Weissmann, a former prosecutor for the Department of Justice who served as a lead member of the Robert Mueller investigation. Trump has called Weissman “scum” and “a bad guy,” and name-checked him on more than one executive order, one revoking his security clearance and others, and another targeting his law firm for daring to employ him.Weissmann says Trump can hate on him all he wants — but the pres…