Christian Menefee, a freshman Democratic US representative, beat veteran congressman Al Green on Tuesday in a fierce runoff that was the product of Republican gerrymandering.

Last year, the Republican-dominated Texas legislature unveiled a congressional map designed to flip seats in the GOP’s favor. Donald Trump had urged the state’s lawmakers to safeguard the party’s congressional majority.

Under the new map, Green, a congressional fixture for over two decades and a staunch Trump critic, saw his reliably Democratic ninth district effectively eliminated. He announced a bid for the 18th district in November.

Menefee was sworn into the seat in January, after winning a special election to replace the late US representative Sylvester Turner.

On the campaign trail, Green sought to link Menefee with big-money politics, accusing his challenger of being aligned with “Trump crypto cronies”, Houston Public Media reported.

Green’s protests of the Trump administration have garnered national attention in recent years.

In February, he was ejected from the president’s State of the Union address after holding a sign that read “Black people aren’t apes!” It was a counter to Trump sharing a racist AI-generated video where Barack and Michelle Obama were depicted as the simians.