Democrats from the US have arrived in Charlotte, North Carolina, for their party's National Convention.<br /><br />Aside from a show of general support, the event will also be a chance for the forty-forth president of the United States and his party to lay out the agenda for 2012.<br /><br />Al Jazeera's Patty Culhane, reporting from Charlotte, looks back at Obama's biggest successes and most notable failures.
