Freshman Rep. Christian Menefee defeated longtime Rep. Al Green in the Democratic primary runoff for Texas’ 18th Congressional District, NBC News projects, after a rare incumbent-on-incumbent matchup sparked by Republican-led redistricting efforts.

The redraw of the state’s political map pitted one of the newest members of the House Democratic caucus against one of the longer-serving incumbents in the chamber. Menefee got 46% of the primary vote to Green’s 44% in the first round on March 3, pushing the race to a runoff since neither got majority support.

Menefee, 38, was sworn in to Congress earlier in 2026 after winning a special election to replace the late Rep. Sylvester Turner, a Democrat who died last year.

Green, 78, opted to run in the deep-blue, Houston-based 18th District after his 9th District was redrawn to make it more heavily Republican, a key part of the GOP plan to gain more seats in Texas in 2026.