(CNN) - A special New Jersey State Assembly committee investigating the George Washington Bridge scandal that has rocked the administration of Gov. Chris Christie gets to work on Thursday, and the first priority is to subpoena documents as well as current and former aides, two sources familiar with the matter told CNN.

Former Deputy Chief of Staff Bridget Kelly, the governor's chief spokesman, Mike Drewniak, and Bill Stepien, a sharp-elbowed Christie political confidante who managed both his successful gubernatorial runs, are on the list, according to the sources.

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