Marco Rubio: The Electable Conservative? Nate Silver
Some commentators have expressed surprise upon learning about the very conservative voting record of Senator Marco Rubio of Florida, who delivered the Republican response to the State of the Union address last week.
Since winning his Senate seat, Mr. Rubio has generally sided with other Republicans as part of a party that has steadily grown more conservative over the last three decades. (Mr. Rubios recent support for immigration reform is more of an exception than his usual rule of sticking to the party line.)
Being reliably conservative, however, is hardly a liability for someone who might hope to win the Republican presidential nomination in 2016. Indeed, one reason to watch Mr. Rubio carefully is that, among the candidates who will be deemed reliably conservative by Republican voters and insiders, he may stand the best chance of maintaining a reasonably good image with general election voters.
How does Mr. Rubios conservatism compare to the other men and women who might seek the Republican nomination in 2016 and to other candidates, like Mitt Romney, that the G.O.P. has nominated recently?
There are several statistical methods that seek to rate candidates ideology on a left-right scale.
http://fivethirtyeight.blogs.nytimes.com/2013/02/19/marco-rubio-the-electable-conservative/?hp