I have opposed Rubio from the beginning because of his stance on immigration, but I think we have to be fair to Fox. They are behaving as the media always behaves and one cannot ascribe their reaction to Rubio beating expectations as out of the norm.
By the way, compare Rubio's speech to Trump's halfhearted effort now on the Fox screen. Rubio is obviously light-years ahead of Trump in histrionic ability. Trump had really better watch out in New Hampshire, Rubio is a big threat to him now and I expect the Trump supporters to divert some of their venom away from Ted Cruz toward Marco Rubio.

Marco Rubio is ESTABLISHMENT.
Ted CRUZ is NOT QUALIFIED.
Donald Trump is the only contender who has what it will take to bring back America to her foundations.
Histrionic Ability? Really? That qualifies somebody who is still wet behind the ears and a royal spoiled brat who is too good to go to work for the people who hired him!
Damn good summary, Nathan.
Not that much difference between Cruz & Trump and Trump & Rubio with respect to results. Cruz won’t have the same results elsewhere.
>>>”Rubio is obviously light-years ahead of Trump in histrionic ability.”
Pretty low bar given Trump’s, “I think I may come here and buy a farm” concession speech: