PPP: Obama leads Huckabee by 3, Romney by 5, Palin by 12 and Jeb Bush by 14

[Mehmentum]

This poll gives hope to candidates like Daniels and Huntsman. If they could ever break out and get some big attention, they could be formidable opponents to Obama.

Of course, breaking out means winning one of the first four (IA, NH, NV, SC) and that seems very unlikely unless Romney just crumbles.

Which is extremely likely if a serious challenger emerges.  His "coalition" isn't pro-Romney, it's anti-Palin.  As it stands, I would put a large amount of money on a darkhorse like Daniels or Huntsman winning the nomination.

It depends.  If Huckabee or even Palin is running, then I wouldn't bet on a darkhorse. Huckabee would win Iowa (or if he isn't running, Palin would), Romney wins New Hampshire and then Nevada, and South Carolina will almost certainly go to Huckabee or Palin, depending on which one won Iowa.  There would be no room for anybody else.

If those two aren't running, then one of the unknowns going to emerge as the conservative candidate in Iowa. (much like Huckabee in 2008).