Much of the political press leans left and has zero experience in politics. Perhaps they graduated Ivy League, did a tour or two at Salon or some lefty blog, then got in on the ground floor at a national media outlet covering politics….
The truth of the matter is that while the candidates on the debate stage with Marco and the reporters who resentfully follow him around all the time have heard the same lines over and over and over, most of the American public has not. And when the people in Nashua, NH hear it for the first time, it may be new to the press, but in Manchester it is new to the crowd and old to the press. By the time Rubio gets to Lebanon, NH, the crowd again hears it for the first time, but the press has heard it incessantly.
Therefore Rubio is a robot to the press and his debate stage opponents.
To the public, though, he is on message. For eight years the GOP elite and pundit class have bitched and moaned that the GOP needed to stay focused and on message. Along come Ted Cruz and Marco Rubio who both relentlessly stay on message and the GOP have decided one is unlikable and the other is a robot. It is all nonsense.