A California-based organization advocating for open government has filed a lawsuit against New Jersey, demanding access to what it says are emails between former Gov. Chris Christie and companies connected to Jared Kushner, President Donald Trump’s son-in-law and senior adviser.

The organization, MapLight, based in Berkeley, California, filed the lawsuit in Mercer County Superior Court on Wednesday, seeking access to emails sent between Christie and members of his administration and Kushner and others from his companies, between Feb. 1, 2017, and Jan. 15, 2018.