The conservative advocacy group Citizens United filed a new lawsuit against the U.S. State Department Monday, asking that a judge compel the agency to respond to long-lingering freedom of information requests from the organization.

In its new suit, the group asks for the State Department to respond to four separate requests seeking documents that were filed in May and July of last year. They included a request for correspondence between Huma Abedin, a top aide to Secretary of State Hillary Rodham Clinton, and officials at the Teneo Consulting firm. Teneo was founded by Doug Band, a former aide to President Bill Clinton. For a time, Abedin was employed simultaneously by Teneo and the State Department.

Another request sought correspondence between Abedin and officials with the Clinton Foundation and another sought records showing correspondence between Clinton's chief of staff, Cheryl Mills, and officials with the Clinton Foundation. The group indicated that the State Department has released no documents in response to any of the requests.

State Department officials have said they receive thousands of requests under filed under public information laws each year and they attempt to respond to each in the order it was received. But conservative groups have been pressing their case for more transparency since it was revealed that Clinton used only a private e-mail account as secretary of state. She turned over 55,000 pages of records to the state department last year and officials are now reviewing those documents for public release.

However, Clinton has said it was she and her lawyers who reviewed some 62,000 emails she sent over the four years she was secretary of state to determine which dealt with state department work and she be handed over to the agency and which were private. Some 31,800 emails deemed to be purely personal were deleted.

On Friday, a federal judge ruled in a separate suit filed by Citizens United that the State Department must begin releasing passenger manifests from overseas trips taken by Clinton during her four years in office.

The group filed a Freedom of Information Action request for those the documents in July and then sued the department when it had received no information by December.

U.S. District Court Judge Gladys Kessler ordered the State Department to produce the records on a rolling basis, with a first round of documents released no later than April 3 and then additional records produced every two weeks thereafter.