Even when Congress is in recess, House Oversight Committee Chairman Darrell Issa is on top of things.

In a letter to Secretary of State John Kerry, Issa subpoenaed documents relating to Benghazi, in addition to the 100 emails he already released.

The Hill is reporting:

In the letter, Issa states that the department’s release of 100 emails earlier this month was “incomplete.” Issa demands that Kerry produce “relevant documents through subpoena. The enclosed subpoena covers documents and the communications related to talking points prepared for members of the House Permanent Select Committee on Intelligence and used by Ambassador Susan Rice during her September 16th, 2012, appearances on CBS, NBC, ABC, Fox, and CNN.”

Issa said that the documents released on May 20 did not answer “critical” questions posed by the committee as it investigates what happened during the attack on the U.S. consulate in Benghazi, Libya, and the aftermath of that terror attack that killed former U.S. Ambassador to Libya Chris Stephens and three other Americans.

Issa has proven to be a reliable pain for the Obama administration, and he isn’t letting go of Benghazi. The emails he obtained previously revealed key changes to the talking points, so these documents could be key in filling in some gaps.