Congressman Tom Graves will be the guest speaker at the Dawson County Chamber of Commerce monthly luncheon at noon Thursday. A republican from Ranger, Graves was elected to fill Nathan Deal’s unexpired seat in June 2010 after serving seven and half years in the Georgia General Assembly. In the Georgia General Assembly, Graves authored legislation that was nationally recognized and designed to help small businesses put Georgians back to work through a series of tax credits, cuts and incentives for small businesses.