Hey, we might get someone who is anti-freedom but lazy and bad at it. Lautenberg was a vociferous advocate for destroying the Constitution, if his replacement is less strident we still win to the small degree possible in a place like New Jersey.
And with any luck Christie will pick someone horrific enough to tank his chances at a POTUS run in 2016. Given the GOP's history of loving big .gov NE liberals with an R in front of their name I view him as one of the biggest threats in the party right now. He's like a louder, fatter John McCain.