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 is debating the controversial GOP redistricting bill that triggered a weekslong House standoff. The Republican-backed proposal, which passed the House in an 88-52 party-line vote on Wednesday, aims to redraw the state's congressional map and produce five new GOP-leaning districts.

Gov. Greg Abbott is expected to sign the bill into law, setting up race to redraw maps in California to neutralize Republican gains.

Houston Sen. Carol Alvarado plans to filibuster a Republican bill that redraws congressional maps and adds five GOP-leaning districts, part of a Trump-backed strategy to secure House control.

Texas state Rep. Gene Wu joined a private strategy call on Thursday with Democratic leaders from other GOP-led states that might also redraw their maps.

Texas is on the brink of redrawing congressional districts in a partisan bid to give Republicans five additional districts. The move is setting off a bipartisan war across the U.S.

The California Legislature voted on Thursday to ask the state’s voters to gerrymander their congressional districts, aiming to flip five GOP-held House seats and offset Texas Republicans’ redistricting drive.