Calvert, who currently represents California's 41st Congressional District, announced his campaign​ shortly after California voters passed Proposition 50,​ which shifted five districts to be more favorable to Democrats in the midterm elections this year.

Since President Donald Trump urged Texas Republicans to redraw U.S. House districts last year, Republicans in Missouri, North Carolina, Ohio, Florida and Tennessee also have enacted new maps that could help the party win additional seats

The Supreme Court has handed Alabama a victory in its effort to change voting district maps, part of the broader national arms race to change voting and control of Congress ahead of the 2026 midterms. On Monday, the Supreme Court reversed a lower court’s ...

Some Republicans want to convert the St. Louis-based 1st Congressional District into a winnable seat, after successfully carving up Kansas City in order to oust Rep. Emanuel Cleaver II. But doing that could place the entire map at risk for a Democratic takeover.