Democrat Joseph Kopser and Republican Chip Roy will vie for the District 21 Congressional seat this November after both claimed victory in Tuesday’s primary runoff.

Kopser, who finished with the second most votes in the March 6 Democratic Primary, upset Mary Wilson by roughly 4,000 votes Tuesday, according to unofficial, final election results.

In the CD 21 Republican primary, Chip Roy beat Matt McCall by more than 7,000 votes to claim the nomination.

Kopser and Roy will fight for the seat h...