TRENTON, NJ (CBS) – New Jersey Governor Chris Christie says he has no problem going on the witness stand when the bridge scandal case goes to trial.

Earlier this week, former Port Authority official Bill Baroni and the governor’s former deputy chief of staff, Bridget Kelly, pleaded not guilty to charges they played a role in politically-motivated traffic jams that caused long delays in 2013 on the George Washington Bridge.

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Christie spoke to reporters during a stop in Mississippi.

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“If they want to subpoena me, that’s fine. I’ve fully cooperated with the investigation since the beginning, and I’m happy to tell anybody everything I know, which I’ve done with three separate investigations now that have come to the same conclusion that I said the day after this happened. So I don’t have any misgivings about that at all,” Christie said.

Last Friday, former Christie ally David Wildstein pleaded guilty.

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Gov. Christie has not been implicated in the case.