Yes it is ridiculously early, but as an indication of rank and file thinking at this point there are some interesting points.
Sarah Palin has not given any indication, beyond a generalized statement, that she might run and it would be fair to imagine that the Republican voters have not looked at her in a substantial manner as a potential candidate at this point. Palin supporters see things in a different light of course.
Given this non-determinate status for Palin, the fact that she places amongst the top seen big names might indicate, surely, that if she declared she woudl immediately vault up to amongst the very top.
Even with all the "we need an Hispanic" noise and media puff pieces about Rubio he is only eleven pints ahead of Palin. Further it would seem unlikely that Huckabee and Rice will run so the field is much narrower in reality and that means less of a blockage for Palin's rise.
Note too that Palin has the fourth highest favorability and net favorabilty ratings, both of which would rise if she declared.
Here is part of PPP's results and analysis, the whole post is
"PPP's newest national poll finds Marco Rubio as the early choice of Republicans for 2016. 18% would like him to be their nominee to 14% for Chris Christie, 12% for Jeb Bush and Paul Ryan, 11% for Mike Huckabee, 8% for Condoleezza Rice, 7% each for Sarah Palin and Rand Paul, and 4% for Rick Santorum.
Rubio's ahead because of his strength with the most conservative wing of the party. Among 'very conservative' voters he's at 23% to 17% for Paul Ryan and 13% for Mike Huckabee. He also had the advantage with folks describing themselves as 'somewhat conservative' at 22% to 14% for Chris Christie and 13% for Jeb Bush. Christie has a big lead with moderates at 35% to 20% for Bush and 11% for Huckabee with Rubio all the way back at 5%. But there just aren't that many moderates left in the Republican Party.
Here's how all the Republican hopefuls stack up in terms of net favorability:"