Watch this video of President Obama delivering his second inaugural address. Notice how the president uses the gestural mode to support his points. Pay particular attention to his hand gestures and facial expressions.
Download transcript.
Source: http://www.whitehouse.gov/photos-and-video/video/2013/01/21/president-obama-delivers-his-second-inaugural-address
Compare the video of President Obama with a video of Condoleezza Rice, US secretary of state under George W. Bush, giving a speech at the Republican National Convention in 2012.
Download transcript.
Source: http://www.cbsnews.com/video/watch/?id=7419844n