The Big Number: 27

As we mentioned a few weeks ago, it's extremely difficult to poll likely caucus-goers in Iowa. But more and more polling companies are getting involved, and it will be fascinating to see which ones come closest to measuring a very well-informed -- and very fickle -- caucus electorate.

A Zogby poll out this afternoon is the latest red meat from Iowa, and it's just too good to make you wait until tomorrow's Hotline to read the results. Ex-Sen. John Edwards (D-NC) reclaims his lead at the top of the Dem heap with a whopping 27%, while on the GOP side, things remain close between ex-NYC Mayor Rudy Giuliani and Sen. John McCain. The results, after the jump.

A Zogby poll; conducted 1/15-16; surveyed 596 likely Dem caucus-goers (margin of error +/- 4.1%) and 465 likely GOP caucus-goers (margin of error +/- 4.6%); released 1/17).

WH '08 Primary Election Matchup     WH '08 Primary Election Matchup
(GOPers only)                       (Dems only)
R. Giuliani             19%         J. Edwards              27%
J. McCain               17          B. Obama                17
N. Gingrich             13          T. Vilsack              16
C. Rice                  9          H. Clinton              16
M. Romney                5          J. Biden                 3
T. Tancredo              2          J. Kerry                 3
C. Hagel                 2          Other/undec             18
S. Brownback             1
T. Thompson              1
M. Huckabee              1
Other/undec             31

Note: This list only includes candidates who received at least 1% in the poll. Other candidates included in the poll were Haley Barbour, George Pataki, Wes Clark, Chris Dodd, Mike Gravel, Dennis Kucinich and Bill Richardson. [REID WILSON]