Obama, Huckabee Lead in D.M. Register Poll

GOP: Huckabee 29 (up 17% since October), Romney 24 (down 5), Giuliani 13   Dems: Obama 28, Clinton 25, Edwards 23   Obama leads among women, erasing Clinton's October advantage.   Margin of error in both polls: 4.4%. Read more on the poll here, and Davd Yepsen's take here.   HALPERIN'S TAKE: Romney and Clinton must ask, "Will attacking their chief rivals in Iowa in December bring their rivals down, or make them stronger?"