Rosen: Watching the line

(CNN)– I am fixated on the dial line at the bottom of the screen on CNN. Women are responding very enthusiastically to Obama. And women have been the larger part of the undecided vote in the battleground states. They like his specificity on tax cuts, the budget, education and energy. And now the environment has just sent both men and women to the top line.

McCain only gets to the top line with either men or women when he is positive. Each time he criticizes Obama, the line flattens.