Newbusters only mentions/reports, without comment, that Mark Levin, an unreliable source(see above), questions the status, and the added citation seems to view Levin as a demagogue, so they have no part in the questioning of  tax  exempt status themselves. It is unclear as to why York is included since he in no way brings up the issue of whether MMfA should have tax exempt status. 
Conservative reception should not be a vehicle for fringe positions. The Progressive Reception section, while weak and probably a good candidate for removal as well, doesn't sink that low. Mr