The Supreme Court's ruling in Watson v. RNC handed Mississippi an unexpected win on 29 June 2026: a 5-4 majority upheld the state's five-day mail-ballot grace period, letting Mississippi and 13 other states plus DC keep counting ballots postmarked by election day and received up to five business days later. Most observers had expected the Court to side with the RNC and strip the grace period nationwide, which would have removed an estimated 1.3 million military and overseas ballots from tallies in the most-affected states.

Mississippi's redistricting fight, by contrast, fizzled. Governor Tate Reeves called a special session on 5 May 2026 in the immediate wake of the Callais ruling, but the legislature narrowed its scope to state Supreme Court districts only and declined to touch the state's four congressional seats, leaving MS-2, the Delta's majority-Black district and the state's only Democratic-held seat, untouched. The refusal, alongside South Carolina's Senate rejecting its own redraw, pulled the Callais harvest estimate down from a notional 15 seats toward the lower end of Cook Political Report's 12-15 range.

Mississippi has one of the highest Black population shares of any US state at around 38 percent, and MS-2's survival keeps intact the most significant majority-Black congressional seat in the Deep South even as neighbouring states redraw aggressively. The state's dual role this cycle, both a redistricting near-miss and the named party that reshaped national mail-ballot law, makes it an unusually load-bearing data point for how FAR the post-Callais cascade actually reaches.

Common Questions

Why did Mississippi call a special session in May 2026?

Governor Tate Reeves called the session on 5 May 2026 after the Supreme Court's Callais ruling ended the VRA Section 2 requirement to preserve majority-minority districts, but the legislature narrowed the session to state Supreme Court districts and Left the four congressional seats, including MS-2, untouched.Source: Lowdown reporting

What is Mississippi's MS-2 congressional district?

MS-2 is the majority-Black district anchored in the Mississippi Delta and the state's only Democratic-held congressional seat. It survived the post-Callais redistricting round when the legislature declined to redraw congressional maps in its May 2026 special session.Source: Lowdown reporting

How many Black residents does Mississippi have compared to its congressional representation?

Around 38 percent of Mississippi's population is Black, yet the state only has one majority-Black congressional district. The Callais ruling removes the VRA constraint that required that district to exist.

What did the Supreme Court decide in Watson v. RNC?

On 29 June 2026 the Supreme Court ruled 5-4 that Mississippi's five-day mail-ballot grace period is lawful, upholding similar laws in 13 other states plus DC and preserving an estimated 1.3 million military and overseas ballots that would otherwise have been excluded.Source: Lowdown reporting

Source Material

Mississippi's 2nd congressional district

How the World Sees Them

Democrats

MS-2's survival was a relief, but Democrats note the reprieve came from legislative restraint, not law, and could be undone by a later session. Watson v. RNC's outcome was a genuine surprise win.

Republicans

Reeves let the session narrow to state courts rather than risk a fight over MS-2's Delta core; Republicans still call the map framework race-neutral going into 2026.

Civil rights advocates

MS-2 survived by legislative choice rather than legal protection now that Callais has removed the federal backstop; advocates warn the district remains vulnerable in a future session.