CBS. (PDF) 11/6-10. Republicans. MoE ±5% (chart shows date of poll release):
I put up a post on these numbers
earlier, highlighting the fact that Herman Cain was leading with just 18% and that Newt Gingrich was apparently rising from the ashes. But I also complained the the full results weren't available, and now that that they are, you can see why they are important: nearly one-third of Republican voters say they don't know who they plan to vote for, or they plan to vote for someone who wasn't on the debate stage Wednesday night.
Here's how close things are: Herman Cain and Rick Perry are separated by 10 points. That's a smaller gap than separates Herman Cain from the undecided/other category. And while Mitt Romney is alleged to have locked the nomination up, he's down six points in this poll.
These numbers are consistent with the fact that 72% of Republicans surveyed said they hadn't made up their mind. And by math, that means anybody telling you they know for sure who will win the Republican nomination might as well be telling you that Rudy Giuliani won it in 2008.
10:49 AM PT: blue aardvark notes Newt Gingrich has the most firm support of any candidate in the latest Marist Poll:
Gingrich has firm support from .43*.19=8.17%. Romney has firm support from .30*.23=6.9%. Cain has firm support from .31*.17=5.27%.