AP/Jacquelyn Martin
In this March 30, 2014, photo U.S. Secretary of State John Kerry listens to a question at a news conference in Paris. The United States is talking with Israel about the possibility of releasing convicted spy Jonathan Pollard early from his life sentence as an incentive in the troubled Mideast peace negotiations, a person familiar with the situation said Monday March 31, 2014.
In a letter to Kerry Friday, Issa described the State Department's response to congressional investigations into the attack as "disturbing."
"The State Department's response to the congressional investigation of the Benghazi attack has shown a disturbing disregard for the Department's legal obligations to Congress," Issa wrote.
Issa's subpoena comes after the State Department produced previously unreleased emails showing White House officials discussing talking points about the attack after it occurred. Those original talking points, which have drawn substantial criticism from Republicans, argued the attack was "rooted in an internet video" about the Muslim Prophet Muhammad and not any policy failures.
In his letter to Kerry, Issa said it was "alarming" the emails were not released to congressional investigators sooner.
"Compliance with a subpoena for documents is not a game. Because your Department is failing to meet its legal obligations, I am issuing a new subpoena to compel you to appear before the Committee to answer questions about your agency's response to the congressional investigation of the Benghazi attack," Issa wrote.
The State Department did not immediately respond to a request for comment from Business Insider Thursday.
Issa's subpoena isn't the only sign Republicans are stepping up their focus on Benghazi. According to the Weekly Standard, an unnamed House leadership aide said House Speaker John Boehner is "seriously considering" establishing a select committee to investigate the attacks and subsequent government response.