A powerful, deep-pocketed force in California politics endorsed redrawing the state's congressional maps to counter President Trump's effort to push GOP states, notably Texas, to increase his party's numbers in Congress in next year's midterm election.

As a Texas senator summoned the F.B.I. to round up Democrats, the redistricting war that began in Texas was spreading, with California aiming at five Republican House seats.

Texas Democrats continue to camp out in different states across the country seeking to block voting back home on new congressional maps that would give Republicans more winnable seats. The Texas