A senior State Department aide testified under oath that he "can't recall" sending a 2011 email in which he suggested then-Secretary of State Hillary Clinton use a government email account.

"I don't recall why, no," he said. "I don't recall the circumstances that led me to ... to write that," said Stephen Mull, who ran Clinton's office at State. 

Mull, who is helping implement the Iran nuclear deal, also testified in a civil lawsuit that he doesn't remember when he learned that Clinton was using a private email server to conduct official business.

Judicial Watch released the transcript of the three-hour deposition late Monday.

The group has sued the State Department over access to Clinton's emails. 

Fox News chief intelligence correspondent Catherine Herridge reported the latest this morning, explaining that the State Department has now said it has 22,000 FOIA requests and they could take decades to resolve. 

Watch the full report above.

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