Kean Jr. is the best that we can hope for from NJ. At least he'll organize with the Rs and we might get his vote half the time. Half a loaf is better than none. When I lived in NJ 35 years ago it was a competitive state. Now its solid blue.
If he gets elected, as a freshman Senator if he has any hopes to accrue some standing, Kean will be voting with the Republicans a heck of a lot more than half the time.
With few exceptions, freshman Senators basically do what they're told to do by Party leadership.