Rubio was the establishments choice.
The establishment have some level of control over the media.
The discomfort that Trump caused both parties is very attractive to Americans who are looking for a clean slate.
Rubio had a horrible spoilt private school boy persona which was attractive to no one.
But Jeb was the initial establishment choice, and the media savagely ripped him apart like a pack of rabid hyenas and loved every second of it, so was that really much of a factor?
Not a very big payday for his $120 M investment in the media then.
