From the Politico today:

Stone has hired a military officer from the real Bush White House to serve as his accuracy guru, advising him as to the “truthiness” of pivotal scenes set in the Oval Office and the Situation Room. While criticism of the film from Bush supporters is all but inevitable, realism was indeed a major concern for the film’s production designers. “I was ushered in to see Oliver almost immediately upon my arrival in Shreveport,” recalled retired Rear Adm. Deborah Loewer. “Basically, he asked me to keep him honest when it comes to the historical perspective. The first words he said to me were: ‘Please tell me what you see. Help me make this as accurate and correct as possible.’”

But what really is Admrial Loewer’s role? The article continues:

“Admiral Deb,” as she prefers to be called, wasn’t on the set to provide input on the script, written by Stone’s “Wall Street” scenarist Stanley Weiser. But she did offer some tweaking of military lingo. Mostly she was there to help set designers and art directors accurately duplicate the Situation Room, where the National Security Council met — everything from props to wall monitors to desk placement, even the appearance of Secret Service agents.
“It’s very accurate as to the dimensions of the room and where all the chairs would be, even down to the secure telephone next to the president’s chair,” she said. “We worked very hard to ensure historical accuracy and technical details, so anyone in military uniform [was depicted correctly and] the things that happened in and around the White House Situation Room were seen as they really were.”

And her other specialty:

And, of course, practically all the actors on the film, from Brolin to Wright and everyone in between, picked her brain about Bushisms.
Of Brolin, she said, “He’s done a lot of study, trying to understand who the character is and his mannerisms, and of course we talked a lot about him. … He worked very hard trying to copy his voice and to look as much like the president as he possibly could. I’d give him a big thumbs up.”
Things got so bizarre at times that Brolin would finish a White House scene but stay in character as he walked off the set. During those moments, Loewer would tell Brolin, “Mr. President, you did a great job.”

Good to know the color of the chairs and Bush’s accent will be portrayed correctly.