I think they just leaked the candidates she led. Christie could be beating her. (I wonder why Rubio doesn't...)
Rubio is a political hack with huge vulnerabilities as a Presidential nominee. He won because liberal and moderate voters split a US Senate race 45-40-15 in the freak election of 2010. He may not be as egregious as some other imagined GOP leaders. Our political system can expose serious weaknesses of any nominee.
The class of new Republican winners of 2010 in Senatorial and Gubernatorial elections so far looks like a weak lot. Senators Ayotte? Toomey? Burr? Rubio? R. Johnson? Kirk? Coates? Rand Paul? Governors Corbett? Snyder? Kasich? Walker? Scott? Brewer? Just about any Democrat who survived the 2010 election can look strong now.
I would advise people to not predict that anyone is going to win the Presidency in 2016 because "he can swing this key state". If it didn't work for Mitt Romney or Paul Ryan, it is not going to work for someone who can be cast as an extremist, who has been excessively confrontational, can be linked to corruption or personal scandal, or who has questionable business practices.
Barack Obama got elected from a Sure D state. Dubya got elected from a Sure R state. Bill Clinton got elected from what then seemed a Sure D state in anything other than an R blowout. The elder Bush was more ambiguous. Reagan got elected from a state that until then best described as Sure R except in D blowouts. Carter got elected once from a State then best described as Sure D except in R blowouts. Nixon? See also Reagan. LBJ got elected from what was then a very D state. Kennedy got elected from a very D state.