1)He uses gestures to involve the audience.
2)He acts confident to make the audience choose him over Romney.
3)He does not fidget when he speaks to show his confidence.
4)He looks firm and not so happy-go-lucky.
Use Of Voice
5)He speaks loudly.
6)He speaks with a strong voice to sound confident.
7)He makes pauses from time to time.
8)He encourages the Americans to support him by getting them to showing their contributions.
9)He pronounces his words correctly.