New Newsweek poll in Iowa (Dec 5-6) that shows among likely GOP voters, Mike Huckabee has taken a commanding two-to-one lead over Mitt Romney:

Republicans
Huckabee 39 (+33 vs. last poll Sept 26-27)
Romney 17 (-8)
Thompson 10 (-6)
Giuliani 9 (-6)
Paul 8 (+6)
McCain 6 (-1)
Undecided 8 (-13)

With the addition of this poll, Huckabee's lead pops to 5.2% in the RCP Average in Iowa.

On the Democratic side, Obama is up 1 point among "all voters," but his lead over Hillary Clinton expands to 6 points among those likely to participate in the January caucuses:

Democrats
Obama 35 (+10 vs. last poll Sept 26-27)
Clinton 29 (-2)
Edwards 18 (-3)
Richardson 9 (+3)
Biden 4 (+1)
Undecided 5 (-7)

Obama leads by 2.2% in the RCP Average in Iowa.