As you know, John McCain has his own ties to the infamous Steele dossier, so it's probably not too surprising that he's less than thrilled about the release of the Nunes memo. However, he might have gone a little further than you'd expect with his objections. If releasing the document is a case of forcing federal transparency, federal transparency is now, somehow, "Vladimir Putin's" job.
According to a statement from the AZ Senator (and reported by the Huffington Post) releasing the memo "only Putin's" interest: