http://maddowblog.msnbc.com/_news/2012/11/19/15282119-rubio-on-earths-age-im-not-a-scientist-man imo, it's an automatic disqualifier.  however it is further evidence that the GOP may not be interested in distancing itself from its Evangelical base. i highly doubt that Rubio actually believes in a young earth, but his reluctance to plainly discuss a scientific fact for fear of alienating himself…