The mysterious unemployed man who won the Democratic nomination for U.S. Senate in South Carolina will make his first campaign speech this Sunday. Alvin Greene didn't have a campaign website or war chest when he won the primary election in June. He hadn't even made a single campaign speech. And he says he still doesn't have any rallies or fundraisers planned as he prepares to challenge incumbent Republican Senator Jim DeMint. But he now has one speech on his calendar. This Sunday he will address the Manning chapter of the NAACP. "He accomplished what many thought that was impossible," says the chapter's president Robert Fleming. "He was willing to step out and make the commitment and I admire anyone for making such a sacrifice because he wants to make South Carolina a better place." Fleming grew up in Manning, too, and says he has known Greene since the candidate was a child. Fleming says he's not quite sure how Greene pulled off the Primary victory, but he likens it to the biblical story of David and Goliath. He says people in Manning believe the 32-year-old unemployed veteran has a chance in November. "The word in the barbershop, the word on the street, the word in the church parking lots is that everyone is pulling for him," says Fleming. The NAACP Manning chapter frequently invites political figures to its monthly meetings, but does not endorse candidates. Greene will have about 20 minutes to address the group on Sunday at 4 p.m. at Ebenezer Missionary Baptist Church. Fleming says about 200 people usually attend the meetings, but given the public interest in this Sunday's gathering, he's looking for a larger venue. Fleming says the NAACP also plans to invite Republican Senator Jim DeMint to speak in Manning at a future meeting.