Today in National Polls: Clinton and Obama Tied in Iowa

Hillary Clinton and Barack Obama are tied in Iowa; Mitt Romney, at 26 percent, barely leads Huckabee, who has 24 percent of the vote. [Strategic Vision]

Clinton is still maintaining a tiny lead nationally over the top two G.O.P. contenders, according to one poll. [Gallup]

But she is more popular with African American voters than any other major candidate, according to a study. [Joint Center for Political and Economic Studies]

And at least one politico thinks polling over the holidays is particularly unreliable. [Ambinder]