This article had a lot of good details as to why FOX buckled & I don’t recall seeing Rush’s name mentioned:
Donald Trump and Roger Ailes Make Up for Now
http://nymag.com/daily/intelligencer/2015/08/donald-trump-and-roger-ailes-make-up-for-now.html?mid=twitter-share-di
Thanks for the link. There was another interesting link in your link:
http://nymag.com/daily/intelligencer/2015/08/fox-news-picked-trump-over-megyn-kelly.html