(CNN) - A Democratic group is going up with one of their first attacks against New Jersey Gov. Chris Christie over his administration's lane closures to one of the nation's busiest bridges, allegedly for political purposes.
Correct the Record, formed in part to defend Hillary Clinton, is an arm of American Bridge, an pro-Democratic group that specializes in opposition research. The group launched a graphic Tuesday showing the Republican Garden State leader in front of the George Washington Bridge with a traffic sign that says "political retribution" and "Lane closed. Expect Christie?"
The issue began in September, on the first day of school, when two of the three access lanes from Fort Lee to the bridge were shut down. The closures sparked speculation by Democrats that the action amounted to political retaliation against the mayor of Fort Lee who did not endorse Christie's re-election.
The Christie administration has brushed off the controversy saying Democrats were the ones playing politics with the matter.
Asked about the closures at a press conference on Monday, Christie responded sarcastically: "I moved the cones, actually unbeknownst to everybody."
But Correct the Record said Christie needs to be held accountable for the lane closures.
"Chris Christie owes the people of New Jersey straight answers about his role in this alleged abuse of power for political retribution," Adrienne Elrod, communications director at Correct the Record. "Chris Christie should come clean about any knowledge of or involvement with these lane closures rather than offer glib and flippant deflections."
The Port Authority of New York and New Jersey testified before the New Jersey state legislature Tuesday that the closures were done at the direction of David Wildstein, a political appointee of the governor. The administration said the closures were for a traffic study but port authority officials testifying Monday said there was no such study. Wildstein announced last week that he would resign over the controversy, saying the issue had become a "distraction."
The Port Authority Deputy Executive Director Bill Baroni said last month the traffic study was meant to judge whether Fort Lee needed three of the 12 lanes to the bridge.
Christie reiterated that sentiment at the press conference saying: "We should look at this policy because I don’t know why one town gets three lanes."
CNN's Ashley Killough and Dana Davidsen contributed to this report.