But political groups and news organizations said requests for records related to Mrs. Clinton had repeatedly gone unanswered.

In December, The Associated Press said its FOIA requests for records related to Mrs. Clinton’s tenure at the State Department, the oldest of which was submitted in March 2010, were not answered. In addition to requesting Mrs. Clinton’s schedules, The A.P. asked for correspondence related to Huma Abedin’s special arrangement to serve as a top adviser to Mrs. Clinton and consult for private clients. “We have not received any documents yet, despite the promised deadlines, and we are evaluating the situation,” said Erin Madigan White, spokeswoman for The A.P.

Conservative groups have filed numerous requests for information about Mrs. Clinton as she prepares for a possible presidential run. Citizens United is expecting a court ruling on Friday about a lawsuit the group filed last year after the State Department would not disclose flight records that would have shown who accompanied Mrs. Clinton on overseas trips. The group had intended to cross reference the agency’s flight manifests with the donors who contributed to the Bill, Hillary & Chelsea Clinton Foundation.

The FOIA request was just one of 16 appeals the group has made to the State Department since May that have gone unfulfilled. Those requests also included specific correspondence from Mrs. Clinton and her closest aides, including Cheryl D. Mills and Ms. Abedin.