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Christie administration staffer resigns amid lane closures probe

The New Jersey governor is on the offensive and sent a stinging memo to supporters attacking his accuser.

A member of New Jersey Gov. Chris Christie's administration who has been subpoenaed in the investigation of the September bridge lane closures has resigned.

Christina Genovese Renna — one of 17 people with ties to Christie subpoenaed by a legislative panel — exited the governor's office Friday, according to a statement provided to NBC News on Sunday by her lawyer, Henry Klingeman. 

In the statement, Renna said her resignation "reflects a decision I have been considering since shortly after the election." Christie won a second term in office in November.

Renna, the state director of departmental relations, reported to Bridget Anne Kelly, Christie's since-fired deputy chief of staff, who apparently set the traffic jam on the George Washington Bridge in motion with an email to David Wildstien, a Christie appointee and ally at the Port Authority.

Wildstein, who has since resigned, was the recipient of Kelly’s “Time for some traffic problems” email on Aug. 13. The lane closures began Sept. 9. 

On Friday, Wildstein claimed to have evidence contradicting the government's account of an alleged scheme to snarl traffic on lanes that funnel traffic from Fort Lee, N.J., to the George Washington Bridge as an apparent act of political retribution against the Democratic mayor of Fort Lee, who had declined to endorse Christie in the governor’s re-election bid.

In a letter to the Port Authority of New York and New Jersey, a lawyer for Wildstein said "evidence exists tying Mr. Christie to having knowledge of the lane closures, during the period when the lanes were closed, contrary to what the Governor stated publicly in a two-hour press conference."

The Associated Press contributed to this report.