An analysis of midterm election data across six Southern states shows that Democratic victories were driven by a combination of high participation in majority-Black counties and a sharp decline in turnout in areas that previously supported Republicans. According to an NPR analysis, Louisiana, Mississippi, Alabama, Georgia, South Carolina, and North Carolina saw an average 22-point shift toward Democrats, exceeding the national average shift of 14.5 points.
The data indicates a difference in how voters participated compared to the 2024 presidential election. In counties won by Kamala Harris in 2024, turnout dropped by 19%, while in counties won by Donald Trump, turnout fell by 26%. This differential turnout was a factor in Democrats flipping U.S. Senate seats in North Carolina, South Carolina, and Mississippi.
In Mississippi, Democrat Scott Colom led incumbent Republican Sen. Cindy Hyde-Smith by just over 5,600 votes as final ballots were being tallied. In North Carolina, former Gov. Roy Cooper won a Senate seat by a 20-point margin, while Republican candidate Michael Whatley received 1.25 million fewer votes than Trump did in 2024. In Georgia, Sen. Jon Ossoff (D) won by 14 points, flipping 12 counties, including suburban Fayette County.
This shift in voting patterns impacted federal representation across approximately 518 counties and parishes. The shift was accompanied by approximately 85% turnout in majority-Black counties compared to 76% in white, non-Hispanic majority counties. The impact is seen in the raw vote totals; for example, North Carolina Republicans saw a 43% drop in support compared to 2024, representing 1.25 million fewer ballots cast for their Senate nominee. In Georgia, Republican candidates in five major counties—Fulton, Gwinnett, Cobb, DeKalb, and Cherokee—lost between 35,000 and 77,000 votes each compared to the 2024 presidential cycle.
For individual voters, these trends translated into changes in representation in the U.S. Senate and House of Representatives. In North Carolina, redrawn congressional maps that were expected to result in an 11-3 Republican majority instead resulted in Democrats being on track to hold an 11-3 majority. Residents in flipped areas, such as Greenville County, South Carolina—which moved from a 20-point Trump victory in 2024 to a 2-point victory for Democrat Annie Andrews—will see a change in their federal representation.
The shift follows the Supreme Court decision in Louisiana v. Callais, which led to the redrawing of congressional maps in Tennessee, Alabama, Louisiana, and North Carolina. These legal changes, combined with the 2026 election results, set the stage for regional political influence heading into the 2028 presidential election. While the midterms have concluded, the final certification of votes continues in some jurisdictions, such as Mississippi, where ballots were still being tallied as of November 11, 2026.