I hesitate even to suggest this because it's so off the wall, but your post got me thinking...
There is one person close to President Trump, you mihgt say inner circle, a person who is sought out by TV networks. This person ran a PAC during the primaries that did some very tough anti-Trump ads. they were a bit rough on him.
Now, this person held a significant position in the campaign and works in the White House. this person could be called a Trump insider.
I won't post the person's name, because it's such an off the wall theory that I'm not that sure of it myself, although there might be some external evidence involving someone close to this person that might bolster the theory. You may be able to guess who I'm talking about, or you might not.
I will not speculate, nor would it be beneficial to do so...... at this point we will find out who it was eventually. I don’t know if it even matters in the big scheme of unexpected crap we have learned.
The really grotesque thing to me if this is true is that the government, under the administration of one party, put a SPY in the opposition party campaign and government for the purposes of a politically sourced and funded investigation to undermine an election.
Well, that would certainly endear this person whom you suspect to the media. One who’s spouse is getting a bit noisy lately.
Given the fact that the DOJ/FBI refuse to identify the individual, it is likely that person is working in the administration this very moment.