New York Times Magazine provides this enlightening information:
In the early days of the new [Trump] administration, [Bill] Kristol and other shellshocked conservatives around Washington started getting together to commiserate. One of the more regular meetings took place every other Tuesday morning, hosted by the Niskanen Center, a new libertarian think tank started by alumni of the Cato Institute. Hosted by Niskanen’s co-founder, Jerry Taylor, the meetings — which participants called “the Meeting of the Concerned” — were held in a conference room in the basement of the CNN building near Union Station...That list, folks, is the entire neocon frontline.
The gatherings attracted a roster of right-of-center familiars: the columnists Mona Charen, David Frum and Jennifer Rubin; the former Oklahoma representative Mickey Edwards; and onetime Republican administration officials like Linda Chavez. They were invitation-only and off the record.