New Fox News/Opinion Dynamics national poll (Dec 18-19). On the Democratic side, Clinton rebounds, extending her lead over Obama:

Democrats
Clinton 49 (+5 vs. last poll Nov 13-14)
Obama 20 (-3)
Edwards 10 (-2)
Biden 3 (+2)
Richardson 2 (-3)
Undecided 12 (+2)

Clinton leads by 17.1% in the RCP National Average.

On the Republican side, Giuliani's free fall in the national polls continue, with the Fox survey showing a sixteen point lead he held over John McCain last month evaporating into a three way tie with the surging Huckabee:

Republicans
Giuliani 20 (-13 vs. last poll Nov 13-14)
Huckabee 19 (+11)
McCain 19 (+2)
Romney 11 (+3)
Thompson 10 (-2)
Paul 3 (nc)
Undecided 13 (nc)

Giuliani's lead in the RCP National Average is down to just 1.3%.

General Election Match Ups
Clinton 42 - McCain 47
Clinton 47 - Huckabee 38

Obama 40 - McCain 44
Obama 44 - Huckabee 35

Click here to get RCP Averages on all general election match ups.