Natinoal Democrats can barely contain their glee over the revelation this morning that New Jersey Gov. Chris Christie – a leading GOP contender for the 2016 presidential race – was not only closely involved with lane closings on the New Jersey side of the George Washington Bridge in September, but that those lanes were closed in a clear act of political retribution.

Emails and texts released by the New York Times show that a deputy chief of staff in Christie’s office gave a signal to the Port Authority to close the lanes about two weeks before the closings occurred.

And Christie’s handpicked chairman of the Port Authority, David Samson, was also involved, according to emails that describe his efforts to “retaliate” against New York officials who had not been told of the changes and sought to ease the gridlock.

Christie had repeatedly insisted that his office had nothing to do with the lane closures, and his many statements were highlighted in a DNC video released late this morning. (Look for the Fred Dicker cameo at the end; it’s a clip from his radio show in which he announces the governor has cancelled his only scheduled public appearance today).

DNC Chairwoman Debbie Wasserman Schultz also issued a statement calling the revelations about the Christie administration’s involvement “troubling,” but not surprising.

“These revelations are troubling for any public official,” Wasserman Schultz said, “but they also indicate what we’ve come to expect from Governor Christie – when people oppose him, he exacts retribution. When people question him, he belittles and snidely jokes. And when anyone dares to look into his Administration, he bullies and attacks.”

“For 121 days, Chris Christie disparaged the questioners and later lied saying no one in his office was involved. That was clearly untrue given the discovery of emails that came directly from his own top staff. Time’s up, Governor.”

From an incredibly hyper-local standpoint, this is a nice gift for Gov. Andrew Cuomo – to see a man who is widely perceived as a potential political rival to the governor at the national level embroiled in a scandal on the very day the governor is giving a high-profile speech that will net him national headlines that are likely to be largely positive.