Lawmakers in Missouri are the latest to try to draw a new U.S. House map for the 2026 election that could improve the Republican Party's numbers in Congress.

It's a trend that began in Texas, at the behest of President Donald Trump, to try to keep GOP control of the House next year. California Democrats responded with their own map to help their party, though it still requires voter approval.

Redistricting typically occurs once a decade, immediately after a census. But in some states, there is no prohibition on a mid-cycle map makeover. The U.S. Supreme Court also has said there is no federal prohibition on political gerrymandering, in which districts are intentionally drawn to one party’s advantage.

Nationally, Democrats need to gain three seats next year to take control of the House.

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