When you see it laid out in a graph, the changes for some Democratic candidates have been quite dramatic. By the end of summer, Edwards and Richardson went into a kind of tail dive in Iowa. Clinton's rise has been steady and continues to climb at the same angle. Obama's sharp rise from the end of summer and continuing now is sharper and more dramatic than Clinton's. Joe Biden remains at a very low level but rising gently. Everyone I know who's a Democrats says, "Biden? I wish! But I also wish he'd shut up sometimes -- the guy talks too much!"