A mid-decade redrawing of congressional boundaries has reshaped Texas’s 3rd Congressional District (CD-3), the Collin-County-anchored seat, and preliminary data suggest Republicans maintain an advantage — even though Democrats saw modest gains in a few areas.
State legislators approved the new map in August 2025 with the aim of flipping up to five House seats statewide. The redrawn CD-3 lines adjust precinct boundaries, splitting or reassigning some areas in parts of McKinney, Frisco, and other suburbs.
Analysis from election observers finds the new map preserves many of CD-3’s reliably Republican neighborhoods — the lean built into the 2021 map remains largely intact. That said, demographic change and suburban growth continue to slowly increase Democratic performance in places like parts of Collin County.
Critics argue the redistricting helped “lock in” Republican control, limiting Democrats’ ability to translate vote-share gains into actual seats.
The result: although Democrats may improve their raw vote tallies in some precincts — including those showing lower turnout compared with 2020 — the 2025 map redraw means CD-3 remains a safe Republican district, preserving the GOP’s structural edge in upcoming elections.