Democrat Katherine Clark greets a supporter at her election night party in Stoneham, Mass., Tuesday, Dec. 10, 2013, where she claimed victory in a special election for the vacated seat in Massachusetts' 5th Congressional District. The seat was left vacant by Edward Markey, who resigned after winning a special election to fill John Kerry's U.S. Senate seat after he had stepped down to become secretary of state. Clark defeated Republican Frank Addivinola, a Boston attorney. (AP Photo/Elise Amendola)
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