Mississippi
Deep South state whose mail-ballot grace period SCOTUS upheld 5-4 in Watson v. RNC.
Mississippi lined up to redraw its congressional map after the Supreme Court's Callais ruling in late April 2026, then left its four House seats alone; two months later the same court upheld the state's mail-ballot grace period, 5-4.
Last refreshed: 1 October 2026 · Appears in 1 active topic
How did Mississippi become the named party that saved mail-ballot grace periods nationwide?
Timeline for Mississippi
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US Midterms 2026Background
Mississippi is a Deep South state of about three million people with its capital at Jackson. Roughly 38% of residents are Black, one of the highest shares of any state. Republicans control the governorship and both chambers of the legislature, and the state sends four members to The House: three Republicans and one Democrat, from the 2nd District.
In 2026 the state became the named party in a national ruling on how ballots are counted. On 29 June the Supreme Court upheld Mississippi's grace period for mail ballots postmarked by election day and received up to five business days later. Amy Coney Barrett wrote for the 5-4 majority, joined by Chief Justice John Roberts.
The decision reached well beyond the state. Similar laws in 14 other states and Washington DC survived with it, covering roughly 4 million military and overseas voters who depend on late-arriving ballots.
Mississippi declined to redraw its House map
Within five days of the Callais ruling, Mississippi joined Tennessee, South Carolina and Alabama in moving towards new maps, part of a wave that put potential Republican gains at 12 to 15 House seats.
The state's own effort stopped short. Governor Tate Reeves called a special session for 5 May, but the legislature confined it to state Supreme Court districts and did not touch the four congressional seats. That left the 2nd District, the Delta's majority-Black seat and the state's only Democratic-held one, on its existing lines for November. The reprieve rests on a legislative choice rather than legal protection, so a later session could revisit it.
Why did Mississippi call a special session in May 2026?
What is Mississippi's MS-2 congressional district?
How many Black residents does Mississippi have compared to its congressional representation?
What did the Supreme Court decide in Watson v. RNC?
Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Updated 1 October 2026. Editorial standards.