National Security Archive researcher Kate Doyle, as well as the archive itself, the Knight First Amendment Institute at Columbia University and Citizens for Responsibility and Ethics in Washington, filed the suit against DHS, which oversees the Secret Service.
The lawsuit seeks "injunctive relief ordering DHS to process and release to plaintiffs immediately the requested records" of visitors to the White House and President Donald Trump's residences.
In 2013, the U.S. Court of Appeals for the District of Columbia ruled that the Secret Service is not obligated by FOIA to disclose White House visitor logs upon request.
Plaintiffs filed the new lawsuit in the U.S. District Court for the Southern District of New York, possibly to distance the case from that precedent. While the White House is mostly exempt from FOIA requests, executive agencies such as the Secret Service are not.