Sen. Hillary Rodham Clinton and Sen. Barack Obama each drew 33% of the support from Democrats surveyed in its latest national poll, Gallup just announced.

In mid-December, well before Obama won last Thursday's Democratic caucuses in Iowa, Clinton held an 18-percentage point lead over him in Gallup's survey -- 45% to 27%. The closest the two had been in a previous Gallup poll: Clinton's 37% to Obama's 36% in early June.

John Edwards remains third in Gallup's polling of Democrats. His support: 20%, vs. 15% in mid-December. At 20%, Edwards is at a new high in Gallup's survey. He touched 19% last April.

On the Republican side, Gallup says Iowa caucuses winner Mike Huckabee has jumped into a national lead for the first time. The rundown: Huckabee, 25%; Rudy Giuliani, 20%; Sen. John McCain, 19%; Fred Thompson, 12%; Mitt Romney, 9%; and Rep. Ron Paul, 4%.

Huckabee's support rose 9 percentage points from mid-December. McCain's rose 5 points. Giuliani's fell 7 points. Thompson's fell 2 points. Romney's fell 5 points.

The surveys of 423 "Republicans or Republican leaners" and 499 "Democrats or Democratic leaners" each have margins of error on all results of +/- 5 percentage points. The polls were conducted Friday-Sunday.

As we noted earlier, Rasmussen Reports said today that its daily tracking poll showed Clinton's lead over Obama nearly gone and that Huckabee had edged ahead among Republicans.

By Mark Memmott and Jill Lawrence, USA Today, January 7, 2008