The four-term 7th District congressman took 38 percent of the vote in the primary on Tuesday to 62 percent for Agriculture Commissioner Ron Sparks.
Davis said Tuesday he has no interest in running for political office again. He says Alabama voters spoke in a decisive way across every sector and section of the state.
Davis voted against the health care overhaul bill in Congress, saying he believed the proposal was too big and expensive.
Davis was the only black Democrat to vote against the measure. He said the vote was consistent with his voting record.