Joe Sestak Defeats Arlen Specter in Pennsylvania Democratic Primary

Rep. Joe Sestak, left, sends Pennsylvania Sen. Arlen Specter into retirement with a stunning come-from-behind victory in the state's Democratic primary.

(FOXNews.com) - Rep. Joe Sestak sent Pennsylvania Sen. Arlen Specter into retirement Tuesday with a stunning come-from-behind victory in the the Democratic primary.

Specter becomes the third incumbent member of Congress in two weeks to lose his job, after Republican Sen. Bob Bennett lost the GOP nomination at the party's Utah convention and Democratic Rep. Alan Mollohan lost a primary in West Virginia.

In November, Sestak will face Pat Toomey, who won the Senate Republican nomination Tuesday.

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