Carter was re-elected in 1964 to serve a second two-year term. For a time in the State Senate, he chaired its Education Committee; he also sat on the Appropriations Committee toward the end of his second term. Before his term ended he contributed to a bill expanding statewide education funding and getting Georgia Southwestern a four-year program. He leveraged his regional planning work, giving speeches around the district to make himself more visible to potential voters. The last day of the term, he announced his run for Congress.