Gary Langer runs a fascinating analysis of which voters in this election are "persuadable", and finds the Midwest really does deserve its status as ultimate battleground and object of candidate affections.
There are some differences among groups. Age is one, with senior voters least apt to be persuadable -18 percent of those older than 65 are persuadable, compared with 28 percent of adults 18 to 64. There’s also a regional effect, with persuadability higher in the Midwest (31 percent) and lowest in the Northeast (18 percent).
Overall, Langer estimates that 29% of Romney's current supporters and 24% of Obama's are "persuadable" -- a pretty high number, considering that, on average, about 92% of voters give pollsters a preference.
