I think CBS news has been reporting that it was well known that Michael Wolff was a reporter. I think it was Major Garrett, who said Wolff was always at the White House and in the press room and that everyone knew he was a reporter. Maybe Garrett meant that all the reporters and people working for the news channels knew Wolff's occupation.
Another reporter was on CBS This Morning claiming that she was shocked that so many Trump people were speaking openly about Trump in the presence of Wolff. It is very possible that these people knew who Wolff was and talked to him because Trump is far worse than we think and these people are trying to take him down from the inside. The reporter who was on TV this morning seemed to have said that Steve Bannon thought he had control of Donald Trump. Maybe when they realized he was not as controllable as they thought and that the Republican Congress was not going to stand up to him they decided they needed to take actions that would cause Trump to be removed from office.
Trump's "deep state" might just be the people that brought him to Washington, D.C. Maybe they were just like the media; thinking that he was just acting and once elected he would drop the crazy act and start acting presidential. When he did not change they may have realized he was not just acting and then decided they needed to take him out of office. Maybe Bannon and others never really thought they could beat Hillary Clinton and, like the Russians, they just wanted to weaken her. Maybe they thought the American people were not stupid enough to elect someone as foolish as Donald Trump. Once Trump did get into office they may have thought they needed to do something to get him out of office.