Supreme Court blocks Trump-backed Missouri congressional map

In a case watched across the country and as voting begins in the midterm elections, the Supreme Court blocked a congressional map in Missouri that was aimed at netting Republicans another seat in the U.S. House.

This is the third time the high court has blocked the redistricting plan that could have helped ousted Democratic Congressman Emanuel Cleaver by increasing the number of Republican voters in his district.

The court warned that changing maps now would cause "electoral chaos." The decision requires the state use the same districts provided to voters in 2022 and 2024. That's even though a different map was used in the primaries there last month.

It comes after weeks of conflicting rulings in state courts and federal courts. Elections officials in Missouri already started mailing some absentee ballots last week using the old districts and some argued it would be too late to change them.