In an interview with Reuters, Bernie Ecclestone has said that the New Jersey Grand Prix has been postponed until 2014 because the organizers need more time to prepare. 

"They've run out of time. There's all sorts of things...and they didn't quite think it all through. They've had a wake-up call but the wake-up call came too late. They couldn't get everything ready in time. That's the bottom line," said Ecclestone. 

The problem comes from the organizers not procuring all of the proper permits and doing necessary repairs to the roads.

The race had been provisionally scheduled for June 16, 2013. 

Source: Reuters