… We have known for a few weeks that Fox News and CNN are going to invite the top 10 candidates based on a national polling average. We also have known that CNN is going to have a secondary debate for those candidates who missed the cut but hit at least 1 percent in the polls. …
Since my article was published, CNN has provided a coherent averaging methodology. It has a long explainer and answered every follow-up question I had about how it was deciding who was in and who was out. Fox News, however, has been less forthcoming in statements to FiveThirtyEight and other media outlets about the rules of its debating game. CONT.
Harry Enten, FiveThirtyEight