For those who say that Hillary can't get elected and they don't know anyone who is voting for her, the proper response is: Ask a young, single woman.

The latest Gallup poll -- combining data in February and March -- shows Hillary getting 43 percent of the votes of women between 18 and 49 but only 27 percent of the votes of men of the same age. It also shows no gap at all between men and women over the age of 50 -- Hillary gets 35 percent of women and 34 percent of men over 50.

Had Gallup divided its sample based on marital status, the results would have been even more dramatic.

Hillary's is a demographic candidacy, not a political candidacy. It does not go up or down easily based on the developments of the campaign because her vote share is rooted in who the voter is, not in how the candidate is perceived.

Almost all of Obama's progress in the past two months has been at the expense of Edwards and undecided. Hillary's vote has remained remarkably stable.