New NBC News/WSJ poll (Dec 14-17) showing Rudy Giuliani losing 13 points over the last month, falling into a tie with Mitt Romney, who added 9 percent support over the same period,with Mike Huckabee right on their tails in 3rd place:

Republicans
Giuliani 20 (-13 vs. last poll Nov 1-5)
Romney 20 (+9)
Huckabee 17 (+9)
McCain 14 (-2)
Thompson 11 (-4)
Paul 4 (nc)
Undecided 9 (+2)

Overall, Rudy still leads by a slim 2.0% in the RCP National Average.

On the Democratic side, the poll shows little change in the past month:

Democrats
Clinton 45 (-2 vs. last poll Nov 1-5)
Obama 23 (-2)
Edwards 13 (+2)
Biden 4 (+1)
Kucinich 4 (+2)
Undecided 7 (+3)

Clinton leads by 17.1% in the RCP National Average.

General Election Match Ups
Clinton 46 - Giuliani 43
Clinton 46 - Huckabee 44

Obama 49 - Giuliani 40
Obama 48 - Huckabee 36