The incredible shrinking — and increasingly valuable — undecided voter

President Obama, Mitt Romney and a slew of outside groups will spend hundreds of millions of dollars over the next three and a half months trying to convince 1/16th of the American electorate to vote their way.

New polling from The Washington Post and ABC News shows there are fewer genuinely undecided voters during the 2012 election campaign than there have been in any of the last three elections. [cont.]

Aaron Blake, Washington Post