The McKinley-Mooney matchup is one of five House races involving two incumbents in the same district. State governments approved new legislative and congressional maps following the 2020 census and population changes. “After redistricting, we always see an increase in the amount of member-on-member primaries. States gain seats, they lose seats. This is just kind of a natural product of that,” said J. Miles Coleman, the associate editor of Sabato’s Crystal Ball at the University of Virginia.