GOP lawmakers have sent many letters to President Obama asking for an accounting of the White House’s actions during deadly terrorist attack in Benghazi on Sept. 11, 1012. There’s been no response from the administration.

Now Sens. John McCain, Lindsey Graham and Kelly Ayotte have narrowed their questions down to a single inquiry and they’re asking for a written response from Obama.

Full letter here.

Graham said on Sunday he will block confirmation of Chuck Hagel and John Brennan if he doesn’t get answers on what happened in Benghazi.

More from tireless investigative reporter Sharyl Attkisson and her colleague, Steve Chaggaris:

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