President defends his 2008 message of 'hope' in acceptance speech at Democratic convention and argues for the path Democrats offer, which he says 'leads to a better place.' | TRANSCRIPTPOWER PLAY: Will Voters Listen to Obama? | Tensions Run High at DNC Amid Venue Downgrade, Heightened SecurityVIDEO: Giffords Leads Convention in Pledge of Allegiance | Democrats Struggle to Explain Fight Over GodOPINION: Democrats Finally Found God | Rep.