Republicans insist that their push to release a secret memo that is said to question the conduct of the F.B.I. and the Justice Department in the early stages of the Russia investigation is not an attempt to undermine the special counsel, Robert S. Mueller. But whatever their intentions, the possible fallout from the memo’s release has everything to do with Mr. Mueller.  Guest: Michael S. Schmidt, who has been covering the Russia investigation for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.