The last time Mike Castle was in the national news, he was being booed by angry town hall demonstrators for having the gall to suggest that Barack Obama is actually a US citizen. Now the nine-term congressman is considering running for Senate in 2010, which could potentially pit him against Joe Biden's son, Beau Biden. It'll be a closely watched race, as Democrats attempt to hold on to their 60 seats in the Senate. Castle is seen as the only Republican with the potential to take the seat...
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