11/05/2010 12:30 am ET Updated May 25, 2011

Who Got The Most Bang For Their Bucks?

After all the talk about the impact of independent groups on this year's midterm elections, the debate over at least one important question can now begin in earnest: Which groups were the most effective?

It is surely a question that donors who contributed giant sums will want to know, although an organization's impact is not measured solely in wins and losses.

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