From a tip from Political Observer:
The DSCC says the Beau Biden will run for Senate.
Democratic Senatorial Campaign Committee Chairman Robert Menendez of New Jersey said Thursday he fully expects Delaware Attorney General Beau Biden to run next year for the seat now held by Democratic Sen. [Ted Kaufman]
The game is starting! Beau Biden’s entry ensures that this will be a closely watched Senate race, even if Castle doesn’t enter.