A top aide to U.S. Vice President-elect Joe Biden was named on Monday to replace him in the Senate after Biden’s son said he wasn’t interested in the job — at least for now.

Delaware Gov. Ruth Ann Minner appointed Ted Kaufman to the seat that Biden, 66, has held since 1973, more than half of his adult life, keeping it in Democratic hands.

There long has been speculation that Beau Biden, Delaware’s attorney general, would eventually replace his father in the Senate.

The seat will come up now in 2010 and Republicans are really going to have to pressure Congressman Castle to go for it. We probably will lose House seat but Castle is still very popular.

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