Republican U.S. Rep. Paul Broun in northeast Georgia defeated a well-funded rival backed by the state GOP establishment.
Democratic U.S. Rep. Jim Marshall crushed a Macon teacher in central Georgia. Rep. David Scott also defeated a Democratic primary challenger. Broun, Marshall and Scott will face rivals from the opposite party in November.
Broun's commanding victory over Barry Fleming comes 11 months after Broun eked out victory in a runoff against a state senator considered being the GOP front-runner for the seat left open by the death of U.S. Rep. Charlie Norwood.
With 99 percent of precincts reporting, Broun led Fleming, an attorney and high-ranking state legislator, 71 percent to 29 percent.
Democratic U.S. Rep. John Barrow easily defeated state Sen. Regina Thomas in the 12th congressional district in eastern Georgia. Barrow, who had the support of presumptive Democratic presidential nominee Barack Obama, was leading with 76 percent of the vote to Thomas' 24 percent, with about 96 percent of precincts reporting.
John Stone, a former congressional aide from Augusta, won a three-way GOP primary in that district.
In Atlanta's 5th congressional district, the incumbent Lewis led with 68 percent with 52 percent of precincts reporting.
The Rev. Markel Hutchins and state Rep. "Able" Mable Thomas had argued that Lewis, a national civil rights icon, is out of touch with the needs in his district.
Rep. Jack Kingston, incumbent in coastal Georgia's 1st congressional district, had no Republican challenger, but will face Democrat Bill Gillespie in November.