It is a smear campaign being run out of the Obama White House. The purpose is the same as when Obama ran for Senate, only instead of a Republican standing in the way of an ambitious black candidate, it is a white Democrat standing in Cory Booker’s way.
Booker was going to run against Christie in order to set himself up for a 2016 run for POTUS, but after Hurricane Sandy, Christie was too popular to take on. Plan B is to get Menedez to step aside and let Cory take over his Senate seat.
Democrats think Booker or Cadillac Deval Gov of Mass would be shoo ins for POTUS should they get the nomination in 16. They think the secret formula is blacks at 96%, win the hispanics, and capture the youth.