How the battle over redistricting in 2021 could decide control of the U.S. Congress

(Reuters) - With the rancorous 2020 U.S. election now over, Democrats and Republicans are girding for another national political battle with enormous stakes: redistricting.

Redistricting occurs every 10 years after the U.S. Census completes its decennial count of the national population.

Because the number of U.S. House of Representatives seats allocated to each state is driven largely by population, some states whose population declined will likely lose seats to others that have seen growth. This year, Texas and Florida are among the states expected to gain seats, while New York,...