California's governor said on Friday he will ask voters to approve a ballot measure in November redrawing the state's congressional map in a way likely to create five more Democratic seats, escalating a redistricting war with the Republican-led state of Texas and President Donald Trump.

Democrats concede there’s only so much they can do to keep Texas from redrawing its maps. But they want to encourage blue states to retaliate.

Democrats have left the state, the Republican governor and attorney general have vowed to remove them from office, and a senator has called in the F.B.I.