Notice the way Rahm Emanuel sits straight up in his chair, barely moving. Contrast that with Morgan, who moves more and leans forward, toward Emanuel.
Emanuel's straight and still posture raises his status - giving him an even greater sense of authority. Morgan's movement and posture, on the other hand, lower his status, making him seem more approachable.
From the Green Room: Stillness = status. When you get up to speak, decide whether you are aiming to raise or lower your status. If your goal is to raise your status, maintain a more fixed posture, keep your head still, and use minimal gestures. If your goal is to lower your status, use more movement and lean towards the audience.