Well, we can talk about all the demographic and groups and subgroups of John Edwards’ supporters who may or should or could break for either Hillary Clinton or Barack Obama, but here’s what Gallup shows for their three-day tracking polls from January 28 thru 30, charted along with previous results this month:Rasmussen also shows Obama closing and, in its tracking survey, he was tied with her in yesterdays’ results. Just like before Iowa, Obama seems to be peaking at just the right moment.--Tom Schaller