The purpose behind the letter holds the clue as to who wrote it.
I don’t buy the idea that the purpose is to make Trump go insane strawberry-Cain Mutiny-style. That could be accomplished in any number of ways much safer than this. Woodward’s book is doing the crazy-making well enough anyway.
It’s a mistake not to factor in the affect the midterms might have on the author’s motive. Trump is not going anywhere any time soon, but many in the GOP are in a fight for their seats right now; the Republican Party, at least in part, may be who the author is trying to save. This suggests to me that the author is a politician, who cares more about image and electability, than a career public servant. Just keeping their head down as they hog tie Trump quietly has not helped rescue the Republican’s image from Trump’s branding, so the op-ed is a desperate move to do that, I think.
What senior officials have a history of running for political office and might see themselves as saviors of the Party’s “good name”? Those folks would be my first round of suspects.
Then, after considering that the op-ed might be an attempt to dissociate the author (not just the GOP) from Trump’s ugliness, there’s another piece of analysis to worth through. Who is the most at risk of being seen as Trump enabler, due to their position, reputation, and history in the WH? Whose clout is the most at risk by being seen as a Trump enabler? Who stands to lose the most if their clout is tainted at the same time it becomes necessary for them to have it?
Look at Conway who I believe fails the test. She sold her soul to the devil a long ass time ago; she’s so in deep she knows what the history books are going to say about her and she doesn’t care. The not caring is how she’s been effective at lying and spinning so well. So why would she a pen a letter aimed at showing there are people in the WH who do care? It’s out of her character.
Halley and Huntsman have less to worry about than others in being seen as Trump enablers. Halley in particular has openly contradicted him, and Huntsman isn’t exactly seen as a trusted Trump advisor.
Kelly and Mattis are not politicians. They are Republicans but they haven’t made their careers by representing the party or concerning themselves with its platform. I think they would’ve been just fine working quietly behind the scenes to control Trump without going to the NYT to advertise it.
Dan Coats counts as a politician because he was a senator before joining the administration. But, as National Intelligence Director, I don’t see him as someone who would risk outing himself with an op-ed like this. Trump is already poisoning the public against the intelligence community on an unrelenting basis; if he were to be unmasked as the author, Coats would have to know that it wouldn’t just be him paying the price. He has also not hid the fact that Russia meddled with the election, which means it should be clear to all that he is not Trump’s lackey. He has nothing to prove to the public by writing this letter.
So I think it’s Pence, as I’ve said before. His reputation and political currency is most at stake, he’s the most at risk of being seeing as Trump’s partner in crime (so he has motive to show otherwise), and the well-being of the Republican Party is of most interest to him because of the prospect of being POTUS one day.