Republican lawmakers are pursuing the unusual mid-decade redistricting plan amid pressure from President Donald Trump to protect the GOP’s slim majority in the U.S. House.

The Texas Senate has given final approval to a new, Republican-leaning congressional voting map, sending it to Gov. Greg Abbott for his signature

The California legislature on Thursday approved a redistricting package aimed at giving Democrats five more seats in the U.S. Congress, countering a partisan advantage President Donald Trump hoped to gain from a similar Republican plan to redraw political maps in Texas.

California Democrats are hoping to turn the push for voters to approve new congressional maps into a referendum on Trump.

California’s Democratic-controlled legislature passed a trio of bills aimed at redrawing the state’s congressional map. The move, designed to send five more Democrats to Congress, is a direct response to Texas doing the same thing with Republican seats.