New emails suggest the Christie administration retaliated against another Democratic mayor.
Subpoenas will likely be issued to Bridget Anne Kelly and Bill Stepien, a Democrat says.
The probe centers on a Jersey Shore tourism campaign starring the governor, his family.
Mayor Steve Fulop said he had meetings canceled after declining to back Chris Christie.
Terry McAuliffe (D) was sworn into office Saturday as Virginia’s 72nd governor.
The actor said he has discussed the possibility with Sheriff Joe Arpaio.
Nikki Haley showed a photo of a Beretta PX4 Storm she received as a Christmas gift.
"I had nothing to do with it," the Republican governor said of the controversial closures.
Holding the event on the island will put the issue of immigration front and center.
Gov. Jerry Brown (D) has raised more than $13 million.