Not quite, but still irrefutably true. The fact, as posted by another user, that FOX is an order of magnitude ahead of their nearest competitor shows that it is those competitors who are the "wacky outliers" and that FOX News is, by logical conclusion, mainstream.
Again: "not quite". Being "mainstream" within a fringe group doesn't make you "mainstream". -- The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt. -- Bertrand Russell