Delaware County congressman Joe Sestak is about to begin an announcement tour on Tuesday morning of his not-so-secret Democratic primary challenge to unseat Pennsylvania's senior US senator Arlen Specter.
When Senator Specter made the switch in April to the Democratic party, after 28 years in the senate as a Republican, Joe Sestak, now serving his second term in congress was critical of President Obama and Governor Rendell for supporting Specter.
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