Christie has been under intense political scrutiny after it was revealed that some of his top political aides shut down key traffic lanes on the George Washington Bridge -- the busiest bridge in the world -- in September for what appear to be politically motivated reasons.
The bridge is one of the most trafficked in the country and leads from New York City directly to the town of Fort Lee, N.J. The lanes were allegedly closed by Christie aides and staffers at the Port Authority of New York and New Jersey, the agency that oversees the bridge, in retribution for the mayor of Fort Lee's refusal to endorse Christie for governor.
Christie has denied any knowledge of the motivation behind the lane closures and so far no evidence has been shown that he knew about the reason for the lane closures.
Originally the closures were said to be part of a traffic study.
Complicating matters for investigators is the fact that the legislative session is scheduled to end on Tuesday, which could mean a legislative subpoena issued on Monday would expire the next day. A special legislative session has been scheduled on Thursday to vote on extending the investigative probe.
Some Democratic lawmakers are saying that Christie could face impeachment hearings if it turns out he knew about the lane closures and authorized them.